@types/luxon

Version 3.4.2
Published 1 year ago
120 kB
No dependencies
MIT license

Install

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Overview

TypeScript definitions for luxon

Index

Variables

variable VERSION

const VERSION: string;

Classes

class DateTime

class DateTime<IsValid extends boolean = DefaultValidity> {}

A DateTime is an immutable data structure representing a specific date and time and accompanying methods. It contains class and instance methods for creating, parsing, interrogating, transforming, and formatting them.
A DateTime consists of the following parts: * A timestamp. Each DateTime instance refers to a specific millisecond of the Unix epoch. * A time zone. Each instance is considered in the context of a specific zone (by default, the local system's zone). * Configuration properties that affect how output strings are formatted, such as locale, numberingSystem, and outputCalendar.
Here is a brief overview of the most commonly used functionality it provides:
* **Creation**: To create a DateTime from its components, use one of its factory class methods: DateTime.local, DateTime.utc, and (most flexibly) DateTime.fromObject. To create one from a standard string format, use DateTime.fromISO, DateTime.fromHTTP, and DateTime.fromRFC2822. To create one from a custom string format, use DateTime.fromFormat. To create one from a native JS date, use DateTime.fromJSDate. * **Gregorian calendar and time**: To examine the Gregorian properties of a DateTime individually (i.e. as opposed to collectively through DateTime#toObject), use the DateTime#year, DateTime#month, DateTime#day, DateTime#hour, DateTime#minute, DateTime#second, DateTime#millisecond accessors. * **Week calendar**: For ISO week calendar attributes, see the DateTime#weekYear, DateTime#weekNumber, and DateTime#weekday accessors. * **Configuration** See the DateTime#locale and DateTime#numberingSystem accessors. * **Transformation**: To transform the DateTime into other DateTimes, use DateTime#set, DateTime#reconfigure, DateTime#setZone, DateTime#setLocale, DateTime.plus, DateTime#minus, DateTime#endOf, DateTime#startOf, DateTime#toUTC, and DateTime#toLocal. * **Output**: To convert the DateTime to other representations, use the DateTime#toRelative, DateTime#toRelativeCalendar, DateTime#toJSON, DateTime#toISO, DateTime#toHTTP, DateTime#toObject, DateTime#toRFC2822, DateTime#toString, DateTime#toLocaleString, DateTime#toFormat, DateTime#toMillis and DateTime#toJSDate.
There's plenty others documented below. In addition, for more information on subtler topics like internationalization, time zones, alternative calendars, validity, and so on, see the external documentation.

property DATE_FULL

static readonly DATE_FULL: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'October 14, 1983'

property DATE_HUGE

static readonly DATE_HUGE: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Tuesday, October 14, 1983'

property DATE_MED

static readonly DATE_MED: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Oct 14, 1983'

property DATE_MED_WITH_WEEKDAY

static readonly DATE_MED_WITH_WEEKDAY: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Fri, Oct 14, 1983'

property DATE_SHORT

static readonly DATE_SHORT: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 10/14/1983

property DATETIME_FULL

static readonly DATETIME_FULL: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'October 14, 1983, 9:30 AM EDT'. Only 12-hour if the locale is.

property DATETIME_FULL_WITH_SECONDS

static readonly DATETIME_FULL_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'October 14, 1983, 9:30:33 AM EDT'. Only 12-hour if the locale is.

property DATETIME_HUGE

static readonly DATETIME_HUGE: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Friday, October 14, 1983, 9:30 AM Eastern Daylight Time'. Only 12-hour if the locale is.

property DATETIME_HUGE_WITH_SECONDS

static readonly DATETIME_HUGE_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Friday, October 14, 1983, 9:30:33 AM Eastern Daylight Time'. Only 12-hour if the locale is.

property DATETIME_MED

static readonly DATETIME_MED: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Oct 14, 1983, 9:30 AM'. Only 12-hour if the locale is.

property DATETIME_MED_WITH_SECONDS

static readonly DATETIME_MED_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Oct 14, 1983, 9:30:33 AM'. Only 12-hour if the locale is.

property DATETIME_MED_WITH_WEEKDAY

static readonly DATETIME_MED_WITH_WEEKDAY: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like 'Fri, 14 Oct 1983, 9:30 AM'. Only 12-hour if the locale is.

property DATETIME_SHORT

static readonly DATETIME_SHORT: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '10/14/1983, 9:30 AM'. Only 12-hour if the locale is.

property DATETIME_SHORT_WITH_SECONDS

static readonly DATETIME_SHORT_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '10/14/1983, 9:30:33 AM'. Only 12-hour if the locale is.

property day

readonly day: number;

Get the day of the month (1-30ish).
Example 1
DateTime.local(2017, 5, 25).day //=> 25

property daysInMonth

readonly daysInMonth: PossibleDaysInMonth;

Returns the number of days in this DateTime's month
Example 1
DateTime.local(2016, 2).daysInMonth //=> 29
Example 2
DateTime.local(2016, 3).daysInMonth //=> 31

property daysInYear

readonly daysInYear: number;

Returns the number of days in this DateTime's year
Example 1
DateTime.local(2016).daysInYear //=> 366
Example 2
DateTime.local(2013).daysInYear //=> 365

property hour

readonly hour: number;

Get the hour of the day (0-23).
Example 1
DateTime.local(2017, 5, 25, 9).hour //=> 9

property invalidExplanation

readonly invalidExplanation: string;

Returns an explanation of why this DateTime became invalid, or null if the DateTime is valid

property invalidReason

readonly invalidReason: string;

Returns an error code if this DateTime is invalid, or null if the DateTime is valid

property isInDST

readonly isInDST: boolean;

Get whether the DateTime is in a DST.

property isInLeapYear

readonly isInLeapYear: boolean;

Returns true if this DateTime is in a leap year, false otherwise
Example 1
DateTime.local(2016).isInLeapYear //=> true
Example 2
DateTime.local(2013).isInLeapYear //=> false

property isOffsetFixed

readonly isOffsetFixed: boolean;

Get whether this zone's offset ever changes, as in a DST.

property isValid

readonly isValid: boolean;

Returns whether the DateTime is valid. Invalid DateTimes occur when: * The DateTime was created from invalid calendar information, such as the 13th month or February 30 * The DateTime was created by an operation on another invalid date

property isWeekend

readonly isWeekend: boolean;

Returns true if this date is on a weekend, according to the locale, false otherwise

property locale

readonly locale: string;

Get the locale of a DateTime, such as 'en-GB'. The locale is used when formatting the DateTime

property localWeekday

readonly localWeekday: number;

Get the day of the week, according to the locale. 1 is the first day of the week, and 7 is the last day of the week. If the locale assigns Sunday as the first day of the week, then a date which is a Sunday will return 1.

property localWeekNumber

readonly localWeekNumber: number;

Get the week number of the week year, according to the locale. Different locales assign week numbers differently. The week can start on different days of the week (see localWeekday), and because a different number of days is required for a week to count as the first week of a year.

property localWeekYear

readonly localWeekYear: number;

Get the week year, according to the locale. Different locales assign week numbers (and therefore week years) differently, see localWeekNumber.

property millisecond

readonly millisecond: number;

Get the millisecond of the second (0-999).
Example 1
DateTime.local(2017, 5, 25, 9, 30, 52, 654).millisecond //=> 654

property minute

readonly minute: number;

Get the minute of the hour (0-59).
Example 1
DateTime.local(2017, 5, 25, 9, 30).minute //=> 30

property month

readonly month: number;

Get the month (1-12).
Example 1
DateTime.local(2017, 5, 25).month //=> 5

property monthLong

readonly monthLong: string;

Get the human readable long month name, such as 'October'. Defaults to the system's locale if no locale has been specified
Example 1
DateTime.local(2017, 10, 30).monthLong //=> October

property monthShort

readonly monthShort: string;

Get the human readable short month name, such as 'Oct'. Defaults to the system's locale if no locale has been specified
Example 1
DateTime.local(2017, 10, 30).monthShort //=> Oct

property numberingSystem

readonly numberingSystem: string;

Get the numbering system of a DateTime, such as 'beng'. The numbering system is used when formatting the DateTime

property offset

readonly offset: number;

Get the UTC offset of this DateTime in minutes
Example 1
DateTime.now().offset //=> -240
Example 2
DateTime.utc().offset //=> 0

property offsetNameLong

readonly offsetNameLong: string;

Get the long human name for the zone's current offset, for example "Eastern Standard Time" or "Eastern Daylight Time". Defaults to the system's locale if no locale has been specified

property offsetNameShort

readonly offsetNameShort: string;

Get the short human name for the zone's current offset, for example "EST" or "EDT". Defaults to the system's locale if no locale has been specified

property ordinal

readonly ordinal: number;

Get the ordinal (meaning the day of the year)
Example 1
DateTime.local(2017, 5, 25).ordinal //=> 145

property outputCalendar

readonly outputCalendar: string;

Get the output calendar of a DateTime, such as 'islamic'. The output calendar is used when formatting the DateTime

property quarter

readonly quarter: number;

Get the quarter
Example 1
DateTime.local(2017, 5, 25).quarter //=> 2

property second

readonly second: number;

Get the second of the minute (0-59).
Example 1
DateTime.local(2017, 5, 25, 9, 30, 52).second //=> 52

property TIME_24_SIMPLE

static readonly TIME_24_SIMPLE: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30', always 24-hour.

property TIME_24_WITH_LONG_OFFSET

static readonly TIME_24_WITH_LONG_OFFSET: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23 Eastern Daylight Time', always 24-hour.

property TIME_24_WITH_SECONDS

static readonly TIME_24_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23', always 24-hour.

property TIME_24_WITH_SHORT_OFFSET

static readonly TIME_24_WITH_SHORT_OFFSET: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23 EDT', always 24-hour.

property TIME_SIMPLE

static readonly TIME_SIMPLE: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30 AM'. Only 12-hour if the locale is.

property TIME_WITH_LONG_OFFSET

static readonly TIME_WITH_LONG_OFFSET: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23 AM Eastern Daylight Time'. Only 12-hour if the locale is.

property TIME_WITH_SECONDS

static readonly TIME_WITH_SECONDS: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23 AM'. Only 12-hour if the locale is.

property TIME_WITH_SHORT_OFFSET

static readonly TIME_WITH_SHORT_OFFSET: Intl.DateTimeFormatOptions;

DateTime.toLocaleString format like '09:30:23 AM EDT'. Only 12-hour if the locale is.

property weekday

readonly weekday: number;

Get the day of the week. 1 is Monday and 7 is Sunday
Example 1
DateTime.local(2014, 11, 31).weekday //=> 4
See Also
- https://en.wikipedia.org/wiki/ISO_week_date

property weekdayLong

readonly weekdayLong: string;

Get the human readable long weekday, such as 'Monday'. Defaults to the system's locale if no locale has been specified
Example 1
DateTime.local(2017, 10, 30).weekdayLong //=> Monday

property weekdayShort

readonly weekdayShort: string;

Get the human readable short weekday, such as 'Mon'. Defaults to the system's locale if no locale has been specified
Example 1
DateTime.local(2017, 10, 30).weekdayShort //=> Mon

property weekNumber

readonly weekNumber: number;

Get the week number of the week year (1-52ish).
Example 1
DateTime.local(2017, 5, 25).weekNumber //=> 21
See Also
- https://en.wikipedia.org/wiki/ISO_week_date

property weeksInLocalWeekYear

readonly weeksInLocalWeekYear: number;

Returns the number of weeks in this DateTime's local week year
Example 1
DateTime.local(2020, 6, {locale: 'en-US'}).weeksInLocalWeekYear //=> 52
Example 2
DateTime.local(2020, 6, {locale: 'de-DE'}).weeksInLocalWeekYear //=> 53

property weeksInWeekYear

readonly weeksInWeekYear: number;

Returns the number of weeks in this DateTime's year
Example 1
DateTime.local(2004).weeksInWeekYear //=> 53
Example 2
DateTime.local(2013).weeksInWeekYear //=> 52
See Also
- https://en.wikipedia.org/wiki/ISO_week_date

property weekYear

readonly weekYear: number;

Get the week year
Example 1
DateTime.local(2014, 12, 31).weekYear //=> 2015
See Also
- https://en.wikipedia.org/wiki/ISO_week_date

property year

readonly year: number;

Get the year
Example 1
DateTime.local(2017, 5, 25).year //=> 2017

property zone

readonly zone: Zone<IsValid>;

Get the time zone associated with this DateTime.

property zoneName

readonly zoneName: string;

Get the name of the time zone.

method diff

diff: (
    otherDateTime: DateTime,
    unit?: DurationUnits,
    opts?: DiffOptions
) => Duration<IsValid>;

Return the difference between two DateTimes as a Duration.
Parameter otherDateTime
the DateTime to compare this one to
Parameter unit
the unit or array of units to include in the duration. Defaults to ['milliseconds'].
Parameter opts
options that affect the creation of the Duration
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.
Example 1
let i1 = DateTime.fromISO('1982-05-25T09:45'), i2 = DateTime.fromISO('1983-10-14T10:30'); i2.diff(i1).toObject() //=> { milliseconds: 43807500000 } i2.diff(i1, 'hours').toObject() //=> { hours: 12168.75 } i2.diff(i1, ['months', 'days']).toObject() //=> { months: 16, days: 19.03125 } i2.diff(i1, ['months', 'days', 'hours']).toObject() //=> { months: 16, days: 19, hours: 0.75 }

method diffNow

diffNow: (unit?: DurationUnits, opts?: DiffOptions) => Duration<Valid>;

Return the difference between this DateTime and right now. See DateTime.diff
Parameter unit
the unit(s) to include in the duration. Defaults to ['milliseconds'].
Parameter opts
options that affect the creation of the Duration
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.

method endOf

endOf: (unit: DateTimeUnit, opts?: EndOfOptions) => this;

"Set" this DateTime to the end (meaning the last millisecond) of a unit of time
Parameter unit
The unit to go to the end of. Can be 'year', 'quarter', 'month', 'week', 'day', 'hour', 'minute', 'second', or 'millisecond'.
Parameter opts
options
Example 1
DateTime.local(2014, 3, 3).endOf('month').toISO(); //=> '2014-03-31T23:59:59.999-05:00'
Example 2
DateTime.local(2014, 3, 3).endOf('year').toISO(); //=> '2014-12-31T23:59:59.999-05:00'
Example 3
DateTime.local(2014, 3, 3).endOf('week').toISO(); // => '2014-03-09T23:59:59.999-05:00', weeks start on Mondays
Example 4
DateTime.local(2014, 3, 3, 5, 30).endOf('day').toISO(); //=> '2014-03-03T23:59:59.999-05:00'
Example 5
DateTime.local(2014, 3, 3, 5, 30).endOf('hour').toISO(); //=> '2014-03-03T05:59:59.999-05:00'

method equals

equals: (other: DateTime) => IfValid<boolean, false, IsValid>;

An equality check. Two DateTimes are equal if and only if they represent the same millisecond, have the same zone and location, and are both valid. To compare just the millisecond values, use +dt1 === +dt2.
Parameter other
the other DateTime

method expandFormat

static expandFormat: (fmt: string, localeOpts?: LocaleOptions) => string;

Produce the fully expanded format token for the locale Does NOT quote characters, so quoted tokens will not round trip correctly
Parameter fmt
the format string
Parameter localeOpts
Opts to override the configuration options on this DateTime

method fromFormat

static fromFormat: (
    text: string,
    fmt: string,
    opts?: DateTimeOptions
) => DateTimeMaybeValid;

Create a DateTime from an input string and format string. Defaults to en-US if no locale has been specified, regardless of the system's locale. For a table of tokens and their interpretations, see [here](https://moment.github.io/luxon/#/parsing?id=table-of-tokens).
Parameter text
the string to parse
Parameter fmt
the format the string is expected to be in (see the link below for the formats)
Parameter opts
options to affect the creation
Parameter
opts.zone - use this zone if no offset is specified in the input string itself. Will also convert the DateTime to this zone. Defaults to 'local'.
Parameter
opts.setZone - override the zone with a zone specified in the string itself, if it specifies one. Defaults to false.
Parameter
opts.locale - a locale string to use when parsing. Will also set the DateTime to this locale. Defaults to 'en-US'.
Parameter
opts.numberingSystem - the numbering system to use when parsing. Will also set the resulting DateTime to this numbering system
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance

method fromFormatExplain

static fromFormatExplain: (
    text: string,
    fmt: string,
    options?: DateTimeOptions
) => ExplainedFormat;

Explain how a string would be parsed by fromFormat()
Parameter text
the string to parse
Parameter fmt
the format the string is expected to be in (see description)
Parameter options
options taken by fromFormat()

method fromHTTP

static fromHTTP: (text: string, opts?: DateTimeOptions) => DateTimeMaybeValid;

Create a DateTime from an HTTP header date
Parameter text
the HTTP header date
Parameter opts
options to affect the creation
Parameter
opts.zone - convert the time to this zone. Since HTTP dates are always in UTC, this has no effect on the interpretation of string,merely the zone the resulting DateTime is expressed in. Defaults to 'local'.
Parameter
opts.setZone - override the zone with the fixed-offset zone specified in the string. For HTTP dates, this is always UTC, so this option is equivalent to setting the zone option to 'utc', but this option is included for consistency with similar methods. Defaults to false.
Parameter
opts.locale - a locale to set on the resulting DateTime instance. Defaults to 'system's locale'.
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
opts.numberingSystem - the numbering system to set on the resulting DateTime instance
Example 1
DateTime.fromHTTP('Sun, 06 Nov 1994 08:49:37 GMT')
Example 2
DateTime.fromHTTP('Sunday, 06-Nov-94 08:49:37 GMT')
Example 3
DateTime.fromHTTP('Sun Nov 6 08:49:37 1994')
See Also
- https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3.1

method fromISO

static fromISO: (text: string, opts?: DateTimeOptions) => DateTimeMaybeValid;

Create a DateTime from an ISO 8601 string
Parameter text
the ISO string
Parameter opts
options to affect the creation
Parameter
opts.zone - use this zone if no offset is specified in the input string itself. Will also convert the time to this zone. Defaults to 'local'.
Parameter
opts.setZone - override the zone with a fixed-offset zone specified in the string itself, if it specifies one. Defaults to false.
Parameter
opts.locale - a locale to set on the resulting DateTime instance. Defaults to 'system's locale'.
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
opts.numberingSystem - the numbering system to set on the resulting DateTime instance
Example 1
DateTime.fromISO('2016-05-25T09:08:34.123')
Example 2
DateTime.fromISO('2016-05-25T09:08:34.123+06:00')
Example 3
DateTime.fromISO('2016-05-25T09:08:34.123+06:00', {setZone: true})
Example 4
DateTime.fromISO('2016-05-25T09:08:34.123', {zone: 'utc'})
Example 5
DateTime.fromISO('2016-W05-4')

method fromJSDate

static fromJSDate: (
    date: Date,
    options?: { zone?: string | Zone }
) => DateTimeMaybeValid;

Create a DateTime from a JavaScript Date object. Uses the default zone.
Parameter date
a JavaScript Date object
Parameter options
configuration options for the DateTime
Parameter
options.zone - the zone to place the DateTime into

method fromMillis

static fromMillis: (
    milliseconds: number,
    options?: DateTimeJSOptions
) => DateTimeMaybeValid;

Create a DateTime from a number of milliseconds since the epoch (meaning since 1 January 1970 00:00:00 UTC). Uses the default zone.
Parameter milliseconds
a number of milliseconds since 1970 UTC
Parameter options
configuration options for the DateTime
Parameter
options.zone - the zone to place the DateTime into. Defaults to 'local'.
Parameter
options.locale - a locale to set on the resulting DateTime instance
Parameter
options.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
options.numberingSystem - the numbering system to set on the resulting DateTime instance

method fromObject

static fromObject: (
    obj: DateObjectUnits,
    opts?: DateTimeJSOptions
) => DateTimeMaybeValid;

Create a DateTime from a JavaScript object with keys like 'year' and 'hour' with reasonable defaults.
Parameter obj
the object to create the DateTime from
Parameter
obj.year - a year, such as 1987
Parameter
obj.month - a month, 1-12
Parameter
obj.day - a day of the month, 1-31, depending on the month
Parameter
obj.ordinal - day of the year, 1-365 or 366
Parameter
obj.weekYear - an ISO week year
Parameter
obj.weekNumber - an ISO week number, between 1 and 52 or 53, depending on the year
Parameter
obj.weekday - an ISO weekday, 1-7, where 1 is Monday and 7 is Sunday
Parameter
obj.hour - hour of the day, 0-23
Parameter
obj.minute - minute of the hour, 0-59
Parameter
obj.second - second of the minute, 0-59
Parameter
obj.millisecond - millisecond of the second, 0-999
Parameter opts
options for creating this DateTime
Parameter
opts.zone - interpret the numbers in the context of a particular zone. Can take any value taken as the first argument to setZone(). Defaults to 'local'.
Parameter
opts.locale - a locale to set on the resulting DateTime instance. Defaults to 'system's locale'.
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
opts.numberingSystem - the numbering system to set on the resulting DateTime instance
Example 1
DateTime.fromObject({ year: 1982, month: 5, day: 25}).toISODate() //=> '1982-05-25'
Example 2
DateTime.fromObject({ year: 1982 }).toISODate() //=> '1982-01-01'
Example 3
DateTime.fromObject({ hour: 10, minute: 26, second: 6 }) //=> today at 10:26:06
Example 4
DateTime.fromObject({ hour: 10, minute: 26, second: 6 }, { zone: 'utc' })
Example 5
DateTime.fromObject({ hour: 10, minute: 26, second: 6 }, { zone: 'local' })
Example 6
DateTime.fromObject({ hour: 10, minute: 26, second: 6 }, { zone: 'America/New_York' })
Example 7
DateTime.fromObject({ weekYear: 2016, weekNumber: 2, weekday: 3 }).toISODate() //=> '2016-01-13'
Example 8
DateTime.fromObject({ localWeekYear: 2022, localWeekNumber: 1, localWeekday: 1 }, { locale: 'en-US' }).toISODate() //=> '2021-12-26'

method fromRFC2822

static fromRFC2822: (text: string, opts?: DateTimeOptions) => DateTimeMaybeValid;

Create a DateTime from an RFC 2822 string
Parameter text
the RFC 2822 string
Parameter opts
options to affect the creation
Parameter
opts.zone - convert the time to this zone. Since the offset is always specified in the string itself, this has no effect on the interpretation of string, merely the zone the resulting DateTime is expressed in. Defaults to 'local'
Parameter
opts.setZone - override the zone with a fixed-offset zone specified in the string itself, if it specifies one. Defaults to false.
Parameter
opts.locale - a locale to set on the resulting DateTime instance. Defaults to 'system's locale'.
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
opts.numberingSystem - the numbering system to set on the resulting DateTime instance
Example 1
DateTime.fromRFC2822('25 Nov 2016 13:23:12 GMT')
Example 2
DateTime.fromRFC2822('Fri, 25 Nov 2016 13:23:12 +0600')
Example 3
DateTime.fromRFC2822('25 Nov 2016 13:23 Z')

method fromSeconds

static fromSeconds: (
    seconds: number,
    options?: DateTimeJSOptions
) => DateTime<Valid>;

Create a DateTime from a number of seconds since the epoch (meaning since 1 January 1970 00:00:00 UTC). Uses the default zone.
Parameter seconds
a number of seconds since 1970 UTC
Parameter options
configuration options for the DateTime
Parameter
options.zone - the zone to place the DateTime into. Defaults to 'local'.
Parameter
options.locale - a locale to set on the resulting DateTime instance
Parameter
options.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
options.numberingSystem - the numbering system to set on the resulting DateTime instance

method fromSQL

static fromSQL: (text: string, opts?: DateTimeOptions) => DateTimeMaybeValid;

Create a DateTime from a SQL date, time, or datetime Defaults to en-US if no locale has been specified, regardless of the system's locale
Parameter text
the string to parse
Parameter opts
options to affect the creation
Parameter
opts.zone - use this zone if no offset is specified in the input string itself. Will also convert the DateTime to this zone. Defaults to 'local'.
Parameter
opts.setZone - override the zone with a zone specified in the string itself, if it specifies one. Defaults to false.
Parameter
opts.locale - a locale string to use when parsing. Will also set the DateTime to this locale. Defaults to 'en-US'.
Parameter
opts.numberingSystem - the numbering system to use when parsing. Will also set the resulting DateTime to this numbering system
Parameter
opts.outputCalendar - the output calendar to set on the resulting DateTime instance
Example 1
DateTime.fromSQL('2017-05-15')
Example 2
DateTime.fromSQL('2017-05-15 09:12:34')
Example 3
DateTime.fromSQL('2017-05-15 09:12:34.342')
Example 4
DateTime.fromSQL('2017-05-15 09:12:34.342+06:00')
Example 5
DateTime.fromSQL('2017-05-15 09:12:34.342 America/Los_Angeles')
Example 6
DateTime.fromSQL('2017-05-15 09:12:34.342 America/Los_Angeles', { setZone: true })
Example 7
DateTime.fromSQL('2017-05-15 09:12:34.342', { zone: 'America/Los_Angeles' })
Example 8
DateTime.fromSQL('09:12:34.342')

method get

get: (unit: keyof DateTime) => number;

Get the value of unit.
Parameter unit
a unit such as 'minute' or 'day'
Example 1
DateTime.local(2017, 7, 4).get('month'); //=> 7
Example 2
DateTime.local(2017, 7, 4).get('day'); //=> 4

method getPossibleOffsets

getPossibleOffsets: () => this[];

Get those DateTimes which have the same local time as this DateTime, but a different offset from UTC in this DateTime's zone. During DST changes local time can be ambiguous, for example 2023-10-29T02:30:00 in Europe/Berlin can have offset +01:00 or +02:00. This method will return both possible DateTimes if this DateTime's local time is ambiguous.

method hasSame

hasSame: (
    otherDateTime: DateTime,
    unit: DateTimeUnit,
    opts?: HasSameOptions
) => IfValid<boolean, false, IsValid>;

Return whether this DateTime is in the same unit of time as another DateTime. Note that time zones are **ignored** in this comparison, which compares the **local** calendar time. Use DateTime.setZone to convert one of the dates if needed.
Parameter otherDateTime
the other DateTime
Parameter unit
the unit of time to check sameness on
Example 1
DateTime.now().hasSame(otherDT, 'day'); //~> true if otherDT is in the same current calendar day

method invalid

static invalid: (reason: string, explanation?: string) => DateTime<Invalid>;

Create an invalid DateTime.
Parameter reason
simple string of why this DateTime is invalid. Should not contain parameters or anything else data-dependent
Parameter explanation
longer explanation, may include parameters and other useful debugging information. Defaults to null.

method isDateTime

static isDateTime: (o: unknown) => o is DateTime<true> | DateTime<false>;

Check if an object is a DateTime. Works across context boundaries
Parameter o

method local

static local: {
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        second: number,
        millisecond: number,
        opts?: DateTimeJSOptions
    ): DateTimeMaybeValid;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        second: number,
        opts?: DateTimeJSOptions
    ): DateTime<true> | DateTime<false>;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        opts?: DateTimeJSOptions
    ): DateTime<true> | DateTime<false>;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        opts?: DateTimeJSOptions
    ): DateTime<true> | DateTime<false>;
    (year: number, month: number, day: number, opts?: DateTimeJSOptions):
        | DateTime<true>
        | DateTime<false>;
    (year: number, month: number, opts?: DateTimeJSOptions):
        | DateTime<true>
        | DateTime<false>;
    (year: number, opts?: DateTimeJSOptions): DateTime<true> | DateTime<false>;
    (opts?: DateTimeJSOptions): DateTime<true>;
};

Create a local DateTime
Parameter year
The calendar year. If omitted (as in, call local() with no arguments), the current time will be used
Parameter month
The month, 1-indexed
Parameter day
The day of the month, 1-indexed
Parameter hour
The hour of the day, in 24-hour time
Parameter minute
The minute of the hour, meaning a number between 0 and 59
Parameter second
The second of the minute, meaning a number between 0 and 59
Parameter millisecond
The millisecond of the second, meaning a number between 0 and 999
Parameter opts
Example 1
DateTime.local() //~> now
Example 2
DateTime.local({ zone: "America/New_York" }) //~> now, in US east coast time
Example 3
DateTime.local(2017) //~> 2017-01-01T00:00:00
Example 4
DateTime.local(2017, 3) //~> 2017-03-01T00:00:00
Example 5
DateTime.local(2017, 3, 12, { locale: "fr") //~> 2017-03-12T00:00:00, with a French locale
Example 6
DateTime.local(2017, 3, 12, 5) //~> 2017-03-12T05:00:00
Example 7
DateTime.local(2017, 3, 12, 5, { zone: "utc" }) //~> 2017-03-12T05:00:00, in UTC
Example 8
DateTime.local(2017, 3, 12, 5, 45) //~> 2017-03-12T05:45:00
Example 9
DateTime.local(2017, 3, 12, 5, 45, 10) //~> 2017-03-12T05:45:10
Example 10
DateTime.local(2017, 3, 12, 5, 45, 10, 765) //~> 2017-03-12T05:45:10.765

method max

static max: <AllValid extends boolean>(
    ...dateTimes: Array<DateTime<AllValid>>
) =>
    | (AllValid extends true ? DateTime<Valid> : never)
    | (AllValid extends false ? DateTime<Invalid> : never);

Return the max of several date times
Parameter dateTimes
the DateTimes from which to choose the maximum

method min

static min: <AllValid extends boolean>(
    ...dateTimes: Array<DateTime<AllValid>>
) =>
    | (AllValid extends true ? DateTime<Valid> : never)
    | (AllValid extends false ? DateTime<Invalid> : never);

Return the min of several date times
Parameter dateTimes
the DateTimes from which to choose the minimum

method minus

minus: (duration: DurationLike) => this;

See DateTime.plus
Parameter duration
The amount to subtract. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()

method now

static now: () => DateTime<Valid>;

Create a DateTime for the current instant, in the system's time zone.
Use Settings to override these default values if needed.
Example 1
DateTime.now().toISO() //~> now in the ISO format

method parseFormatForOpts

static parseFormatForOpts: (
    formatOpts?: DateTimeFormatOptions,
    localeOpts?: LocaleOptions
) => string | null;

Produce the format string for a set of options
Parameter formatOpts
Intl.DateTimeFormat constructor options and configuration options
Parameter localeOpts
Opts to override the configuration options on this DateTime
Example 1
DateTime.parseFormatForOpts(DateTime.DATETIME_FULL); //=> "MMMM d, yyyyy, h:m a ZZZ"

method plus

plus: (duration: DurationLike) => this;

Adding hours, minutes, seconds, or milliseconds increases the timestamp by the right number of milliseconds. Adding days, months, or years shifts the calendar, accounting for DSTs and leap years along the way. Thus, dt.plus({ hours: 24 }) may result in a different time than dt.plus({ days: 1 }) if there's a DST shift in between.
Parameter duration
The amount to add. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()
Example 1
DateTime.now().plus(123) //~> in 123 milliseconds
Example 2
DateTime.now().plus({ minutes: 15 }) //~> in 15 minutes
Example 3
DateTime.now().plus({ days: 1 }) //~> this time tomorrow
Example 4
DateTime.now().plus({ days: -1 }) //~> this time yesterday
Example 5
DateTime.now().plus({ hours: 3, minutes: 13 }) //~> in 3 hr, 13 min
Example 6
DateTime.now().plus(Duration.fromObject({ hours: 3, minutes: 13 })) //~> in 3 hr, 13 min

method reconfigure

reconfigure: (properties: LocaleOptions) => this;

"Set" the locale, numberingSystem, or outputCalendar. Returns a newly-constructed DateTime.
Parameter properties
the properties to set
Example 1
DateTime.local(2017, 5, 25).reconfigure({ locale: 'en-GB' })

method resolvedLocaleOptions

resolvedLocaleOptions: (
    opts?: LocaleOptions | DateTimeFormatOptions
) => ResolvedLocaleOptions;

Returns the resolved Intl options for this DateTime. This is useful in understanding the behavior of formatting methods
Parameter opts
the same options as toLocaleString

method set

set: (values: DateObjectUnits) => this;

"Set" the values of specified units. Returns a newly-constructed DateTime. You can only set units with this method; for "setting" metadata, see DateTime.reconfigure and DateTime.setZone.
This method also supports setting locale-based week units, i.e. localWeekday, localWeekNumber and localWeekYear. They cannot be mixed with ISO-week units like weekday.
Example 1
dt.set({ year: 2017 })
Example 2
dt.set({ hour: 8, minute: 30 })
Example 3
dt.set({ weekday: 5 })
Example 4
dt.set({ year: 2005, ordinal: 234 })

method setLocale

setLocale: (locale: string) => this;

"Set" the locale. Returns a newly-constructed DateTime. Just a convenient alias for reconfigure({ locale })
Example 1
DateTime.local(2017, 5, 25).setLocale('en-GB')

method setZone

setZone: (zone?: string | Zone, opts?: ZoneOptions) => DateTimeMaybeValid;

"Set" the DateTime's zone to specified zone. Returns a newly-constructed DateTime.
By default, the setter keeps the underlying time the same (as in, the same timestamp), but the new instance will report different local times and consider DSTs when making computations, as with DateTime.plus. You may wish to use DateTime.toLocal and DateTime.toUTC which provide simple convenience wrappers for commonly used zones.
Parameter zone
a zone identifier. As a string, that can be any IANA zone supported by the host environment, or a fixed-offset name of the form 'UTC+3', or the strings 'local' or 'utc'. You may also supply an instance of a Zone class. Defaults to 'local'.
Parameter opts
options
Parameter
opts.keepLocalTime - If true, adjust the underlying time so that the local time stays the same, but in the target zone. You should rarely need this. Defaults to false.

method startOf

startOf: (unit: DateTimeUnit, opts?: StartOfOptions) => this;

"Set" this DateTime to the beginning of the given unit.
Parameter unit
The unit to go to the beginning of. Can be 'year', 'quarter', 'month', 'week', 'day', 'hour', 'minute', 'second', or 'millisecond'.
Parameter opts
options
Example 1
DateTime.local(2014, 3, 3).startOf('month').toISODate(); //=> '2014-03-01'
Example 2
DateTime.local(2014, 3, 3).startOf('year').toISODate(); //=> '2014-01-01'
Example 3
DateTime.local(2014, 3, 3).startOf('week').toISODate(); //=> '2014-03-03', weeks always start on Mondays
Example 4
DateTime.local(2014, 3, 3, 5, 30).startOf('day').toISOTime(); //=> '00:00.000-05:00'
Example 5
DateTime.local(2014, 3, 3, 5, 30).startOf('hour').toISOTime(); //=> '05:00:00.000-05:00'

method toBSON

toBSON: () => Date;

Returns a BSON-serializable equivalent to this DateTime.

method toFormat

toFormat: (
    fmt: string,
    opts?: LocaleOptions
) => IfValid<string, 'Invalid DateTime', IsValid>;

Returns a string representation of this DateTime formatted according to the specified format string. **You may not want this.** See DateTime.toLocaleString for a more flexible formatting tool. For a table of tokens and their interpretations, see [here](https://moment.github.io/luxon/#/formatting?id=table-of-tokens). Defaults to en-US if no locale has been specified, regardless of the system's locale.
Parameter fmt
the format string
Parameter opts
opts to override the configuration options on this DateTime
Example 1
DateTime.now().toFormat('yyyy LLL dd') //=> '2017 Apr 22'
Example 2
DateTime.now().setLocale('fr').toFormat('yyyy LLL dd') //=> '2017 avr. 22'
Example 3
DateTime.now().toFormat('yyyy LLL dd', { locale: "fr" }) //=> '2017 avr. 22'
Example 4
DateTime.now().toFormat("HH 'hours and' mm 'minutes'") //=> '20 hours and 55 minutes'

method toHTTP

toHTTP: () => IfValid<string, null, IsValid>;

Returns a string representation of this DateTime appropriate for use in HTTP headers. Specifically, the string conforms to RFC 1123.
Example 1
DateTime.utc(2014, 7, 13).toHTTP() //=> 'Sun, 13 Jul 2014 00:00:00 GMT'
Example 2
DateTime.utc(2014, 7, 13, 19).toHTTP() //=> 'Sun, 13 Jul 2014 19:00:00 GMT'
See Also
- https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3.1

method toISO

toISO: (opts?: ToISOTimeOptions) => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this DateTime
Example 1
DateTime.utc(1982, 5, 25).toISO() //=> '1982-05-25T00:00:00.000Z'
Example 2
DateTime.now().toISO() //=> '2017-04-22T20:47:05.335-04:00'
Example 3
DateTime.now().toISO({ includeOffset: false }) //=> '2017-04-22T20:47:05.335'
Example 4
DateTime.now().toISO({ format: 'basic' }) //=> '20170422T204705.335-0400'

method toISODate

toISODate: (opts?: ToISODateOptions) => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this DateTime's date component
Parameter opts
options
Parameter
opts.format - choose between the basic and extended format. Defaults to 'extended'.
Example 1
DateTime.utc(1982, 5, 25).toISODate() //=> '1982-05-25'
Example 2
DateTime.utc(1982, 5, 25).toISODate({ format: 'basic' }) //=> '19820525'

method toISOTime

toISOTime: (opts?: ToISOTimeOptions) => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this DateTime's time component
Parameter opts
options
Parameter
opts.suppressMilliseconds - exclude milliseconds from the format if they're 0. Defaults to false.
Parameter
opts.suppressSeconds - exclude seconds from the format if they're 0. Defaults to false.
Parameter
opts.includeOffset - include the offset, such as 'Z' or '-04:00'. Defaults to true.
Parameter
opts.includePrefix - include the T prefix. Defaults to false.
Parameter
opts.format - choose between the basic and extended format. Defaults to 'extended'.
Example 1
DateTime.utc().set({ hour: 7, minute: 34 }).toISOTime() //=> '07:34:19.361Z'
Example 2
DateTime.utc().set({ hour: 7, minute: 34, seconds: 0, milliseconds: 0 }).toISOTime({ suppressSeconds: true }) //=> '07:34Z'
Example 3
DateTime.utc().set({ hour: 7, minute: 34 }).toISOTime({ format: 'basic' }) //=> '073419.361Z'
Example 4
DateTime.utc().set({ hour: 7, minute: 34 }).toISOTime({ includePrefix: true }) //=> 'T07:34:19.361Z'

method toISOWeekDate

toISOWeekDate: () => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this DateTime's week date
Example 1
DateTime.utc(1982, 5, 25).toISOWeekDate() //=> '1982-W21-2'

method toJSDate

toJSDate: () => Date;

Returns a JavaScript Date equivalent to this DateTime.

method toJSON

toJSON: () => IfValid<string, null, IsValid>;

Returns an ISO 8601 representation of this DateTime appropriate for use in JSON.

method toLocal

toLocal: () => this;

"Set" the DateTime's zone to the host's local zone. Returns a newly-constructed DateTime.
Equivalent to setZone('local')

method toLocaleParts

toLocaleParts: (opts?: DateTimeFormatOptions) => Intl.DateTimeFormatPart[];

Returns an array of format "parts", meaning individual tokens along with metadata. This is allows callers to post-process individual sections of the formatted output. Defaults to the system's locale if no locale has been specified
Example 1
DateTime.now().toLocaleParts(); //=> [ //=> { type: 'day', value: '25' }, //=> { type: 'literal', value: '/' }, //=> { type: 'month', value: '05' }, //=> { type: 'literal', value: '/' }, //=> { type: 'year', value: '1982' } //=> ]
Example 2
DateTime.invalid('').toLocaleParts(); //=> []
See Also
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat/formatToParts

method toLocaleString

toLocaleString: (
    formatOpts?: DateTimeFormatOptions,
    opts?: LocaleOptions
) => IfValid<string, 'Invalid DateTime', IsValid>;

Returns a localized string representing this date. Accepts the same options as the Intl.DateTimeFormat constructor and any presets defined by Luxon, such as DateTime.DATE_FULL or DateTime.TIME_SIMPLE of the DateTime in the assigned locale. Defaults to the system's locale if no locale has been specified
Parameter formatOpts
Intl.DateTimeFormat constructor options and configuration options
Parameter opts
opts to override the configuration options on this DateTime
Example 1
DateTime.now().toLocaleString(); //=> 4/20/2017
Example 2
DateTime.now().setLocale('en-gb').toLocaleString(); //=> '20/04/2017'
Example 3
DateTime.now().toLocaleString({ locale: 'en-gb' }); //=> '20/04/2017'
Example 4
DateTime.now().toLocaleString(DateTime.DATE_FULL); //=> 'April 20, 2017'
Example 5
DateTime.now().toLocaleString(DateTime.TIME_SIMPLE); //=> '11:32 AM'
Example 6
DateTime.now().toLocaleString(DateTime.DATETIME_SHORT); //=> '4/20/2017, 11:32 AM'
Example 7
DateTime.now().toLocaleString({ weekday: 'long', month: 'long', day: '2-digit' }); //=> 'Thursday, April 20'
Example 8
DateTime.now().toLocaleString({ weekday: 'short', month: 'short', day: '2-digit', hour: '2-digit', minute: '2-digit' }); //=> 'Thu, Apr 20, 11:27 AM'
Example 9
DateTime.now().toLocaleString({ hour: '2-digit', minute: '2-digit', hourCycle: 'h23' }); //=> '11:32'
See Also
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat

method toMillis

toMillis: () => IfValid<number, typeof NaN, IsValid>;

Returns the epoch milliseconds of this DateTime.

method toObject

toObject: <IncludeConfig extends boolean>(opts?: {
    includeConfig?: IncludeConfig;
}) => ToObjectOutput<IncludeConfig, IsValid>;

Returns a JavaScript object with this DateTime's year, month, day, and so on.
Parameter opts
options for generating the object
Parameter
opts.includeConfig - include configuration attributes in the output. Defaults to false.
Example 1
DateTime.now().toObject() //=> { year: 2017, month: 4, day: 22, hour: 20, minute: 49, second: 42, millisecond: 268 }

method toRelative

toRelative: (options?: ToRelativeOptions) => IfValid<string, null, IsValid>;

Returns a string representation of this time relative to now, such as "in two days". Can only internationalize if your platform supports Intl.RelativeTimeFormat. Rounds down by default.
Example 1
DateTime.now().plus({ days: 1 }).toRelative() //=> "in 1 day"
Example 2
DateTime.now().setLocale("es").toRelative({ days: 1 }) //=> "dentro de 1 día"
Example 3
DateTime.now().plus({ days: 1 }).toRelative({ locale: "fr" }) //=> "dans 23 heures"
Example 4
DateTime.now().minus({ days: 2 }).toRelative() //=> "2 days ago"
Example 5
DateTime.now().minus({ days: 2 }).toRelative({ unit: "hours" }) //=> "48 hours ago"
Example 6
DateTime.now().minus({ hours: 36 }).toRelative({ round: false }) //=> "1.5 days ago"

method toRelativeCalendar

toRelativeCalendar: (
    options?: ToRelativeCalendarOptions
) => IfValid<string, null, IsValid>;

Returns a string representation of this date relative to today, such as "yesterday" or "next month". Only internationalizes on platforms that support Intl.RelativeTimeFormat.
Example 1
DateTime.now().plus({ days: 1 }).toRelativeCalendar() //=> "tomorrow"
Example 2
DateTime.now().setLocale("es").plus({ days: 1 }).toRelative() //=> ""mañana"
Example 3
DateTime.now().plus({ days: 1 }).toRelativeCalendar({ locale: "fr" }) //=> "demain"
Example 4
DateTime.now().minus({ days: 2 }).toRelativeCalendar() //=> "2 days ago"

method toRFC2822

toRFC2822: () => IfValid<string, null, IsValid>;

Returns an RFC 2822-compatible string representation of this DateTime, always in UTC
Example 1
DateTime.utc(2014, 7, 13).toRFC2822() //=> 'Sun, 13 Jul 2014 00:00:00 +0000'
Example 2
DateTime.local(2014, 7, 13).toRFC2822() //=> 'Sun, 13 Jul 2014 00:00:00 -0400'

method toSeconds

toSeconds: () => IfValid<number, typeof NaN, IsValid>;

Returns the epoch seconds of this DateTime.

method toSQL

toSQL: (opts?: ToSQLOptions) => IfValid<string, null, IsValid>;

Returns a string representation of this DateTime for use in SQL DateTime
Example 1
DateTime.utc(2014, 7, 13).toSQL() //=> '2014-07-13 00:00:00.000 Z'
Example 2
DateTime.local(2014, 7, 13).toSQL() //=> '2014-07-13 00:00:00.000 -04:00'
Example 3
DateTime.local(2014, 7, 13).toSQL({ includeOffset: false }) //=> '2014-07-13 00:00:00.000'
Example 4
DateTime.local(2014, 7, 13).toSQL({ includeZone: true }) //=> '2014-07-13 00:00:00.000 America/New_York'

method toSQLDate

toSQLDate: () => IfValid<string, null, IsValid>;

Returns a string representation of this DateTime appropriate for use in SQL Date
Example 1
DateTime.utc(2014, 7, 13).toSQLDate() //=> '2014-07-13'

method toSQLTime

toSQLTime: (opts?: ToSQLOptions) => IfValid<string, null, IsValid>;

Returns a string representation of this DateTime appropriate for use in SQL Time
Example 1
DateTime.utc().toSQL() //=> '05:15:16.345'
Example 2
DateTime.now().toSQL() //=> '05:15:16.345 -04:00'
Example 3
DateTime.now().toSQL({ includeOffset: false }) //=> '05:15:16.345'
Example 4
DateTime.now().toSQL({ includeZone: false }) //=> '05:15:16.345 America/New_York'

method toString

toString: () => IfValid<string, 'Invalid DateTime', IsValid>;

Returns a string representation of this DateTime appropriate for debugging

method toUnixInteger

toUnixInteger: () => IfValid<number, typeof NaN, IsValid>;

Returns the epoch seconds (as a whole number) of this DateTime.

method toUTC

toUTC: (offset?: number, opts?: ZoneOptions) => this;

"Set" the DateTime's zone to UTC. Returns a newly-constructed DateTime.
Equivalent to DateTime.setZone('utc')
Parameter offset
optionally, an offset from UTC in minutes. Defaults to 0.
Parameter opts
options to pass to setZone(). Defaults to {}.

method until

until: (
    otherDateTime: DateTime
) => IfValid<Interval<Valid>, DateTime<Invalid>, IsValid>;

Return an Interval spanning between this DateTime and another DateTime
Parameter otherDateTime
the other end point of the Interval

method utc

static utc: {
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        second: number,
        millisecond: number,
        options?: LocaleOptions
    ): DateTimeMaybeValid;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        second: number,
        options?: LocaleOptions
    ): DateTime<true> | DateTime<false>;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        minute: number,
        options?: LocaleOptions
    ): DateTime<true> | DateTime<false>;
    (
        year: number,
        month: number,
        day: number,
        hour: number,
        options?: LocaleOptions
    ): DateTime<true> | DateTime<false>;
    (year: number, month: number, day: number, options?: LocaleOptions):
        | DateTime<true>
        | DateTime<false>;
    (year: number, month: number, options?: LocaleOptions):
        | DateTime<true>
        | DateTime<false>;
    (year: number, options?: LocaleOptions): DateTime<true> | DateTime<false>;
    (options?: LocaleOptions): DateTime<true>;
};

Create a DateTime in UTC
Parameter year
The calendar year. If omitted (as in, call utc() with no arguments), the current time will be used
Parameter month
The month, 1-indexed
Parameter day
The day of the month
Parameter hour
The hour of the day, in 24-hour time
Parameter minute
The minute of the hour, meaning a number between 0 and 59
Parameter second
The second of the minute, meaning a number between 0 and 59
Parameter millisecond
The millisecond of the second, meaning a number between 0 and 999
Parameter options
configuration options for the DateTime
Parameter
options.locale - a locale to set on the resulting DateTime instance
Parameter
options.outputCalendar - the output calendar to set on the resulting DateTime instance
Parameter
options.numberingSystem - the numbering system to set on the resulting DateTime instance
Example 1
DateTime.utc() //~> now
Example 2
DateTime.utc(2017) //~> 2017-01-01T00:00:00Z
Example 3
DateTime.utc(2017, 3) //~> 2017-03-01T00:00:00Z
Example 4
DateTime.utc(2017, 3, 12) //~> 2017-03-12T00:00:00Z
Example 5
DateTime.utc(2017, 3, 12, 5) //~> 2017-03-12T05:00:00Z
Example 6
DateTime.utc(2017, 3, 12, 5, 45) //~> 2017-03-12T05:45:00Z
Example 7
DateTime.utc(2017, 3, 12, 5, 45, { locale: "fr" } ) //~> 2017-03-12T05:45:00Z with a French locale
Example 8
DateTime.utc(2017, 3, 12, 5, 45, 10) //~> 2017-03-12T05:45:10Z
Example 9
DateTime.utc(2017, 3, 12, 5, 45, 10, 765, { locale: "fr") //~> 2017-03-12T05:45:10.765Z with a French locale

method valueOf

valueOf: () => IfValid<number, typeof NaN, IsValid>;

Returns the epoch milliseconds of this DateTime. Alias of DateTime.toMillis

class Duration

class Duration<IsValid extends boolean = DefaultValidity> {}

A Duration object represents a period of time, like "2 months" or "1 day, 1 hour". Conceptually, it is just a map of units to their quantities, accompanied by some additional configuration and methods for creating, parsing, interrogating, transforming, and formatting them. They can be used on their own or in conjunction with other Luxon types; for example, you can use DateTime.plus to add a Duration object to a DateTime, producing another DateTime.
Here is a brief overview of commonly used methods and getters in Duration:
* **Creation** To create a Duration, use Duration.fromMillis, Duration.fromObject, or Duration.fromISO. * **Unit values** See the Duration#years, Duration.months, Duration#weeks, Duration#days, Duration#hours, Duration#minutes, * Duration#seconds, Duration#milliseconds accessors. * **Configuration** See Duration#locale and Duration#numberingSystem accessors. * **Transformation** To create new Durations out of old ones use Duration#plus, Duration#minus, Duration#normalize, Duration#set, Duration#reconfigure, * Duration#shiftTo, and Duration#negate. * **Output** To convert the Duration into other representations, see Duration#as, Duration#toISO, Duration#toFormat, and Duration#toJSON
There's are more methods documented below. In addition, for more information on subtler topics like internationalization and validity, see the external documentation.

property days

readonly days: number;

Get the days.

property hours

readonly hours: number;

Get the hours.

property invalidExplanation

readonly invalidExplanation: string;

Returns an explanation of why this Duration became invalid, or null if the Duration is valid

property invalidReason

readonly invalidReason: string;

Returns an error code if this Duration became invalid, or null if the Duration is valid

property isValid

readonly isValid: boolean;

Returns whether the Duration is invalid. Diff operations on invalid DateTimes or Intervals return invalid Durations.

property locale

readonly locale: string;

Get the locale of a Duration, such as 'en-GB'

property minutes

readonly minutes: number;

Get the minutes.

property months

readonly months: number;

Get the months.

property numberingSystem

readonly numberingSystem: string;

Get the numbering system of a Duration, such as 'beng'. The numbering system is used when formatting the Duration

property quarters

readonly quarters: number;

Get the quarters.

property seconds

readonly seconds: number;

Get the seconds.

property weeks

readonly weeks: number;

Get the weeks

property years

readonly years: number;

Get the years.

method as

as: (unit: DurationUnit) => IfValid<number, typeof NaN, IsValid>;

Return the length of the duration in the specified unit.
Parameter unit
a unit such as 'minutes' or 'days'
Example 1
Duration.fromObject({years: 1}).as('days') //=> 365
Example 2
Duration.fromObject({years: 1}).as('months') //=> 12
Example 3
Duration.fromObject({hours: 60}).as('days') //=> 2.5

method equals

equals: (other: Duration) => IfValid<boolean, false, IsValid>;

Equality check Two Durations are equal iff they have the same units and the same values for each unit.

method fromDurationLike

static fromDurationLike: (durationLike: DurationLike) => Duration<Valid>;

Create a Duration from DurationLike.
Parameter durationLike
Either a Luxon Duration, a number of milliseconds, or the object argument to Duration.fromObject()

method fromISO

static fromISO: (text: string, opts?: DurationOptions) => DurationMaybeValid;

Create a Duration from an ISO 8601 duration string.
Parameter text
text to parse
Parameter opts
options for parsing
Parameter
opts.locale - the locale to use. Defaults to 'en-US'.
Parameter
opts.numberingSystem - the numbering system to use
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.
Example 1
Duration.fromISO('P3Y6M1W4DT12H30M5S').toObject() //=> { years: 3, months: 6, weeks: 1, days: 4, hours: 12, minutes: 30, seconds: 5 }
Example 2
Duration.fromISO('PT23H').toObject() //=> { hours: 23 }
Example 3
Duration.fromISO('P5Y3M').toObject() //=> { years: 5, months: 3 }
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Durations

method fromISOTime

static fromISOTime: (text: string, opts?: DurationOptions) => DurationMaybeValid;

Create a Duration from an ISO 8601 time string.
Parameter text
text to parse
Parameter opts
options for parsing
Parameter
opts.locale - the locale to use. Defaults to 'en-US'.
Parameter
opts.numberingSystem - the numbering system to use
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.
Example 1
Duration.fromISOTime('11:22:33.444').toObject() //=> { hours: 11, minutes: 22, seconds: 33, milliseconds: 444 }
Example 2
Duration.fromISOTime('11:00').toObject() //=> { hours: 11, minutes: 0, seconds: 0 }
Example 3
Duration.fromISOTime('T11:00').toObject() //=> { hours: 11, minutes: 0, seconds: 0 }
Example 4
Duration.fromISOTime('1100').toObject() //=> { hours: 11, minutes: 0, seconds: 0 }
Example 5
Duration.fromISOTime('T1100').toObject() //=> { hours: 11, minutes: 0, seconds: 0 }
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Times

method fromMillis

static fromMillis: (count: number, opts?: DurationOptions) => Duration<Valid>;

Create Duration from a number of milliseconds.
Parameter count
of milliseconds
Parameter opts
options for parsing
Parameter
opts.locale - the locale to use
Parameter
opts.numberingSystem - the numbering system to use
Parameter
opts.conversionAccuracy - the conversion system to use

method fromObject

static fromObject: (
    obj: DurationLikeObject,
    opts?: DurationOptions
) => Duration<Valid>;

Create a Duration from a JavaScript object with keys like 'years' and 'hours'. If this object is empty then a zero milliseconds duration is returned.
Parameter obj
the object to create the Duration from
Parameter
obj.years
Parameter
obj.quarters
Parameter
obj.months
Parameter
obj.weeks
Parameter
obj.days
Parameter
obj.hours
Parameter
obj.minutes
Parameter
obj.seconds
Parameter
obj.milliseconds
Parameter opts
options for creating this Duration. Defaults to {}.
Parameter
opts.locale - the locale to use. Defaults to 'en-US'.
Parameter
opts.numberingSystem - the numbering system to use
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.

method get

get: (unit: DurationUnit) => IfValid<number, typeof NaN, IsValid>;

Get the value of unit.
Parameter unit
a unit such as 'minute' or 'day'
Example 1
Duration.fromObject({years: 2, days: 3}).get('years') //=> 2
Example 2
Duration.fromObject({years: 2, days: 3}).get('months') //=> 0
Example 3
Duration.fromObject({years: 2, days: 3}).get('days') //=> 3

method invalid

static invalid: (reason: string, explanation?: string) => Duration<Invalid>;

Create an invalid Duration.
Parameter reason
simple string of why this datetime is invalid. Should not contain parameters or anything else data-dependent
Parameter explanation
longer explanation, may include parameters and other useful debugging information. Defaults to null.

method isDuration

static isDuration: (o: unknown) => o is Duration<true> | Duration<false>;

Check if an object is a Duration. Works across context boundaries
Parameter o

method mapUnits

mapUnits: (fn: (x: number, u?: DurationUnit) => number) => this;

Scale this Duration by the specified amount. Return a newly-constructed Duration.
Example 1
Duration.fromObject({ hours: 1, minutes: 30 }).mapUnit(x => x * 2) //=> { hours: 2, minutes: 60 }
Example 2
Duration.fromObject({ hours: 1, minutes: 30 }).mapUnit((x, u) => u === "hour" ? x * 2 : x) //=> { hours: 2, minutes: 30 }

method minus

minus: (duration: DurationLike) => this;

Make this Duration shorter by the specified amount. Return a newly-constructed Duration.
Parameter duration
The amount to subtract. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()

method negate

negate: () => this;

Return the negative of this Duration.
Example 1
Duration.fromObject({ hours: 1, seconds: 30 }).negate().toObject() //=> { hours: -1, seconds: -30 }

method normalize

normalize: () => this;

Reduce this Duration to its canonical representation in its current units.
Example 1
Duration.fromObject({ years: 2, days: 5000 }).normalize().toObject() //=> { years: 15, days: 255 }
Example 2
Duration.fromObject({ hours: 12, minutes: -45 }).normalize().toObject() //=> { hours: 11, minutes: 15 }

method plus

plus: (duration: DurationLike) => this;

Make this Duration longer by the specified amount. Return a newly-constructed Duration.
Parameter duration
The amount to add. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()

method reconfigure

reconfigure: (opts?: DurationOptions) => this;

"Set" the locale and/or numberingSystem. Returns a newly-constructed Duration.
Example 1
dur.reconfigure({ locale: 'en-GB' })

method rescale

rescale: () => this;

Rescale units to its largest representation.
Example 1
Duration.fromObject({ milliseconds: 90000 }).rescale().toObject() //=> { minutes: 1, seconds: 30 }

method set

set: (values: DurationLikeObject) => this;

"Set" the values of specified units. Return a newly-constructed Duration.
Parameter values
a mapping of units to numbers
Example 1
dur.set({ years: 2017 })
Example 2
dur.set({ hours: 8, minutes: 30 })

method shiftTo

shiftTo: (...units: DurationUnit[]) => this;

Convert this Duration into its representation in a different set of units.
Example 1
Duration.fromObject({ hours: 1, seconds: 30 }).shiftTo('minutes', 'milliseconds').toObject() //=> { minutes: 60, milliseconds: 30000 }

method shiftToAll

shiftToAll: () => this;

Shift this Duration to all available units. Same as shiftTo("years", "months", "weeks", "days", "hours", "minutes", "seconds", "milliseconds")

method toFormat

toFormat: (
    fmt: string,
    opts?: { floor?: boolean | undefined }
) => IfValid<string, 'Invalid Duration', IsValid>;

Returns a string representation of this Duration formatted according to the specified format string. You may use these tokens: * S for milliseconds * s for seconds * m for minutes * h for hours * d for days * M for months * y for years Notes: * Add padding by repeating the token, e.g. "yy" pads the years to two digits, "hhhh" pads the hours out to four digits * The duration will be converted to the set of units in the format string using Duration.shiftTo and the Duration's conversion accuracy setting.
Parameter fmt
the format string
Parameter opts
options
Parameter
opts.floor - floor numerical values. Defaults to true.
Example 1
Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("y d s") //=> "1 6 2"
Example 2
Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("yy dd sss") //=> "01 06 002"
Example 3
Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("M S") //=> "12 518402000"

method toHuman

toHuman: (opts?: ToHumanDurationOptions) => string;

Returns a string representation of a Duration with all units included To modify its behavior use the listStyle and any Intl.NumberFormat option, though unitDisplay is especially relevant. See Intl.NumberFormat.

Example 1

var dur = Duration.fromObject({ days: 1, hours: 5, minutes: 6 })
dur.toHuman() //=> '1 day, 5 hours, 6 minutes'
dur.toHuman({ listStyle: "long" }) //=> '1 day, 5 hours, and 6 minutes'
dur.toHuman({ unitDisplay: "short" }) //=> '1 day, 5 hr, 6 min'

method toISO

toISO: () => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this Duration.
Example 1
Duration.fromObject({ years: 3, seconds: 45 }).toISO() //=> 'P3YT45S'
Example 2
Duration.fromObject({ months: 4, seconds: 45 }).toISO() //=> 'P4MT45S'
Example 3
Duration.fromObject({ months: 5 }).toISO() //=> 'P5M'
Example 4
Duration.fromObject({ minutes: 5 }).toISO() //=> 'PT5M'
Example 5
Duration.fromObject({ milliseconds: 6 }).toISO() //=> 'PT0.006S'
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Durations

method toISOTime

toISOTime: (opts?: ToISOTimeDurationOptions) => IfValid<string, null, IsValid>;

Returns an ISO 8601-compliant string representation of this Duration, formatted as a time of day.
Parameter opts
options
Parameter
opts.suppressMilliseconds - exclude milliseconds from the format if they are 0. Defaults to false.
Parameter
opts.suppressSeconds - exclude seconds from the format if they're 0. Defaults to false.
Parameter
opts.includePrefix - include the T prefix. Defaults to false.
Parameter
opts.format - choose between the basic and extended format. Defaults to 'extended'.
Example 1
Duration.fromObject({ hours: 11 }).toISOTime() //=> '11:00:00.000'
Example 2
Duration.fromObject({ hours: 11 }).toISOTime({ suppressMilliseconds: true }) //=> '11:00:00'
Example 3
Duration.fromObject({ hours: 11 }).toISOTime({ suppressSeconds: true }) //=> '11:00'
Example 4
Duration.fromObject({ hours: 11 }).toISOTime({ includePrefix: true }) //=> 'T11:00:00.000'
Example 5
Duration.fromObject({ hours: 11 }).toISOTime({ format: 'basic' }) //=> '110000.000'
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Times

method toJSON

toJSON: () => IfValid<string, null, IsValid>;

Returns an ISO 8601 representation of this Duration appropriate for use in JSON.

method toMillis

toMillis: () => IfValid<number, typeof NaN, IsValid>;

Returns a millisecond value of this Duration.

method toObject

toObject: () => DurationObjectUnits;

Returns a JavaScript object with this Duration's values.
Example 1
Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toObject() //=> { years: 1, days: 6, seconds: 2 }

method toString

toString: () => IfValid<string, null, IsValid>;

Returns an ISO 8601 representation of this Duration appropriate for use in debugging.

method valueOf

valueOf: () => IfValid<number, typeof NaN, IsValid>;

Returns a millisecond value of this Duration. Alias of toMillis

class FixedOffsetZone

class FixedOffsetZone extends Zone<true> {}

A zone with a fixed offset (meaning no DST)

property utcInstance

static readonly utcInstance: FixedOffsetZone;

Get a singleton instance of UTC

method instance

static instance: (offset: number) => FixedOffsetZone;

Get an instance with a specified offset
Parameter offset
The offset in minutes

method parseSpecifier

static parseSpecifier: (s: string) => FixedOffsetZone;

Get an instance of FixedOffsetZone from a UTC offset string, like "UTC+6"
Parameter s
The offset string to parse
Example 1
FixedOffsetZone.parseSpecifier("UTC+6")
Example 2
FixedOffsetZone.parseSpecifier("UTC+06")
Example 3
FixedOffsetZone.parseSpecifier("UTC-6:00")

class IANAZone

class IANAZone<IsValid extends boolean = DefaultValidity> extends Zone<IsValid> {}

A zone identified by an IANA identifier, like America/New_York

constructor

constructor(name: string);

method create

static create: (
    name: string
) => CanBeInvalid extends true ? IANAZone<true> | IANAZone<false> : IANAZone;

Same as constructor but has caching.

method isValidSpecifier

static isValidSpecifier: (s: string) => boolean;

Returns whether the provided string is a valid specifier. This only checks the string's format, not that the specifier identifies a known zone; see isValidZone for that.
Parameter s
The string to check validity on
Example 1
IANAZone.isValidSpecifier("America/New_York") //=> true
Example 2
IANAZone.isValidSpecifier("Fantasia/Castle") //=> true
Example 3
IANAZone.isValidSpecifier("Sport~~blorp") //=> false

method isValidZone

static isValidZone: (zone: string) => boolean;

Returns whether the provided string identifies a real zone
Parameter zone
The string to check
Example 1
IANAZone.isValidZone("America/New_York") //=> true
Example 2
IANAZone.isValidZone("Fantasia/Castle") //=> false
Example 3
IANAZone.isValidZone("Sport~~blorp") //=> false

method resetCache

static resetCache: () => void;

Reset local caches. Should only be necessary in testing scenarios.

class Interval

class Interval<IsValid extends boolean = DefaultValidity> {}

An Interval object represents a half-open interval of time, where each endpoint is a DateTime. Conceptually, it is a container for those two endpoints, accompanied by methods for creating, parsing, interrogating, comparing, transforming, and formatting them.
Here is a brief overview of the most commonly used methods and getters in Interval:
* **Creation** To create an Interval, use Interval.fromDateTimes, Interval.after, Interval.before, or Interval.fromISO. * **Accessors** Use Interval#start and Interval#end to get the start and end. * **Interrogation** To analyze the Interval, use Interval#count, Interval#length, Interval#hasSame, * Interval#contains, Interval#isAfter, or Interval#isBefore. * **Transformation** To create other Intervals out of this one, use Interval#set, Interval#splitAt, Interval#splitBy, Interval#divideEqually, * Interval.merge, Interval.xor, Interval#union, Interval#intersection, or Interval#difference. * **Comparison** To compare this Interval to another one, use Interval#equals, Interval#overlaps, Interval#abutsStart, Interval#abutsEnd, Interval#engulfs * **Output** To convert the Interval into other representations, see Interval#toString, Interval#toLocaleString, Interval#toISO, Interval#toISODate, * Interval#toISOTime, Interval#toFormat, and Interval#toDuration.

property end

readonly end: DateTime<true>;

Returns the end of the Interval

property invalidExplanation

readonly invalidExplanation: string;

Returns an explanation of why this Interval became invalid, or null if the Interval is valid

property invalidReason

readonly invalidReason: string;

Returns an error code if this Interval is invalid, or null if the Interval is valid

property isValid

readonly isValid: boolean;

Returns whether this Interval's end is at least its start, meaning that the Interval isn't 'backwards'.

property start

readonly start: DateTime<true>;

Returns the start of the Interval

method abutsEnd

abutsEnd: (other: Interval) => IfValid<boolean, false, IsValid>;

Return whether this Interval's start is adjacent to the specified Interval's end.

method abutsStart

abutsStart: (other: Interval) => IfValid<boolean, false, IsValid>;

Return whether this Interval's end is adjacent to the specified Interval's start.

method after

static after: (start: DateInput, duration: DurationLike) => IntervalMaybeValid;

Create an Interval from a start DateTime and a Duration to extend to.
Parameter start
Parameter duration
the length of the Interval.

method before

static before: (end: DateInput, duration: DurationLike) => IntervalMaybeValid;

Create an Interval from an end DateTime and a Duration to extend backwards to.
Parameter end
Parameter duration
the length of the Interval.

method contains

contains: (dateTime: DateTime) => IfValid<boolean, false, IsValid>;

Return whether this Interval contains the specified DateTime.
Parameter dateTime

method count

count: (
    unit?: DurationUnit,
    opts?: CountOptions
) => IfValid<number, typeof NaN, IsValid>;

Returns the count of minutes, hours, days, months, or years included in the Interval, even in part. Unlike Interval#length this counts sections of the calendar, not periods of time, e.g. specifying 'day' asks 'what dates are included in this interval?', not 'how many days long is this interval?'
Parameter unit
the unit of time to count. Defaults to 'milliseconds'.

method difference

difference: (...intervals: Interval[]) => IntervalMaybeValid[];

Return Intervals representing the spans of time in this Interval that not overlap with any of the specified Intervals.

method divideEqually

divideEqually: (numberOfParts: number) => IfValid<Interval[], [], IsValid>;

Split this Interval into the specified number of smaller intervals.
Parameter numberOfParts
The number of Intervals to divide the Interval into.

method engulfs

engulfs: (other: Interval) => IfValid<boolean, false, IsValid>;

Return whether this Interval engulfs the start and end of the specified Interval.

method equals

equals: (other: Interval) => IfValid<boolean, false, IsValid>;

Return whether this Interval has the same start and end as the specified Interval.

method fromDateTimes

static fromDateTimes: (start: DateInput, end: DateInput) => IntervalMaybeValid;

Create an Interval from a start DateTime and an end DateTime. Inclusive of the start but not the end.
Parameter start
Parameter end

method fromISO

static fromISO: (text: string, opts?: DateTimeOptions) => IntervalMaybeValid;

Create an Interval from an ISO 8601 string. Accepts <start>/<end>, <start>/<duration>, and <duration>/<end> formats.
Parameter text
the ISO string to parse
Parameter opts
options to pass DateTime.fromISO and optionally Duration.fromISO
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Time_intervals

method hasSame

hasSame: (unit: DurationUnit) => IfValid<boolean, false, IsValid>;

Returns whether this Interval's start and end are both in the same unit of time
Parameter unit
the unit of time to check sameness on

method intersection

intersection: (other: Interval) => Interval | null;

Return an Interval representing the intersection of this Interval and the specified Interval. Specifically, the resulting Interval has the maximum start time and the minimum end time of the two Intervals. Returns null if the intersection is empty, meaning the intervals do not intersect.

method invalid

static invalid: (reason: string, explanation?: string) => Interval<Invalid>;

Create an invalid Interval.
Parameter reason
simple string of why this Interval is invalid. Should not contain parameters or anything else data-dependent
Parameter explanation
longer explanation, may include parameters and other useful debugging information.

method isAfter

isAfter: (dateTime: DateTime) => IfValid<boolean, false, IsValid>;

Return whether this Interval's start is after the specified DateTime.
Parameter dateTime

method isBefore

isBefore: (dateTime: DateTime) => IfValid<boolean, false, IsValid>;

Return whether this Interval's end is before the specified DateTime.
Parameter dateTime

method isEmpty

isEmpty: () => boolean;

Return whether this Interval has the same start and end DateTimes.

method isInterval

static isInterval: (o: unknown) => o is Interval<true> | Interval<false>;

Check if an object is an Interval. Works across context boundaries
Parameter o

method length

length: (unit?: DurationUnit) => IfValid<number, typeof NaN, IsValid>;

Returns the length of the Interval in the specified unit.
Parameter unit
the unit (such as 'hours' or 'days') to return the length in.

method mapEndpoints

mapEndpoints: (mapFn: (d: DateTime) => DateTime) => IntervalMaybeValid;

Run mapFn on the interval start and end, returning a new Interval from the resulting DateTimes
Example 1
Interval.fromDateTimes(dt1, dt2).mapEndpoints(endpoint => endpoint.toUTC())
Example 2
Interval.fromDateTimes(dt1, dt2).mapEndpoints(endpoint => endpoint.plus({ hours: 2 }))

method merge

static merge: (intervals: Interval[]) => IntervalMaybeValid[];

Merge an array of Intervals into an equivalent minimal set of Intervals. Combines overlapping and adjacent Intervals.

method overlaps

overlaps: (other: Interval) => boolean;

Return whether this Interval overlaps with the specified Interval

method set

set: (values?: IntervalObject) => IntervalMaybeValid;

"Sets" the start and/or end dates. Returns a newly-constructed Interval.
Parameter values
the values to set
Parameter
values.start - the starting DateTime
Parameter
values.end - the ending DateTime

method splitAt

splitAt: (...dateTimes: DateTime[]) => IfValid<Interval[], [], IsValid>;

Split this Interval at each of the specified DateTimes
Parameter dateTimes
the unit of time to count.

method splitBy

splitBy: (duration: DurationLike) => IfValid<Interval[], [], IsValid>;

Split this Interval into smaller Intervals, each of the specified length. Left over time is grouped into a smaller interval
Parameter duration
The length of each resulting interval.

method toDuration

toDuration: (
    unit?: DurationUnit | DurationUnit[],
    opts?: DiffOptions
) => DurationMaybeValid;

Return a Duration representing the time spanned by this interval.
Parameter unit
the unit or units (such as 'hours' or 'days') to include in the duration. Defaults to ['milliseconds'].
Parameter opts
options that affect the creation of the Duration
Parameter
opts.conversionAccuracy - the conversion system to use. Defaults to 'casual'.
Example 1
Interval.fromDateTimes(dt1, dt2).toDuration().toObject() //=> { milliseconds: 88489257 }
Example 2
Interval.fromDateTimes(dt1, dt2).toDuration('days').toObject() //=> { days: 1.0241812152777778 }
Example 3
Interval.fromDateTimes(dt1, dt2).toDuration(['hours', 'minutes']).toObject() //=> { hours: 24, minutes: 34.82095 }
Example 4
Interval.fromDateTimes(dt1, dt2).toDuration(['hours', 'minutes', 'seconds']).toObject() //=> { hours: 24, minutes: 34, seconds: 49.257 }
Example 5
Interval.fromDateTimes(dt1, dt2).toDuration('seconds').toObject() //=> { seconds: 88489.257 }

method toFormat

toFormat: (
    dateFormat: string,
    opts?: { separator?: string | undefined }
) => IfValid<string, 'Invalid Interval', IsValid>;

Returns a string representation of this Interval formatted according to the specified format string.
Parameter dateFormat
the format string. This string formats the start and end time. See DateTime.toFormat for details.
Parameter opts
options
Parameter
opts.separator - a separator to place between the start and end representations. Defaults to ' - '.

method toISO

toISO: (opts?: ToISOTimeOptions) => IfValid<string, 'Invalid Interval', IsValid>;

Returns an ISO 8601-compliant string representation of this Interval.
Parameter opts
The same options as DateTime#toISO
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Time_intervals

method toISODate

toISODate: () => IfValid<string, 'Invalid Interval', IsValid>;

Returns an ISO 8601-compliant string representation of the dates in this Interval. The time components are ignored.
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Time_intervals

method toISOTime

toISOTime: (
    opts?: ToISOTimeOptions
) => IfValid<string, 'Invalid Interval', IsValid>;

Returns an ISO 8601-compliant string representation of the times in this Interval. The date components are ignored.
Parameter opts
The same options as DateTime.toISO
See Also
- https://en.wikipedia.org/wiki/ISO_8601#Time_intervals

method toLocaleString

toLocaleString: (
    formatOpts?: Intl.DateTimeFormatOptions,
    opts?: LocaleOptions
) => IfValid<string, 'Invalid Interval', IsValid>;

Returns a localized string representing this Interval. Accepts the same options as the Intl.DateTimeFormat constructor and any presets defined by Luxon, such as DateTime.DATE_FULL or DateTime.TIME_SIMPLE. The exact behavior of this method is browser-specific, but in general it will return an appropriate representation of the Interval in the assigned locale. Defaults to the system's locale if no locale has been specified.
Parameter formatOpts
Either a DateTime preset or Intl.DateTimeFormat constructor options. Defaults to DateTime.DATE_SHORT
Parameter opts
Options to override the configuration of the start DateTime.
Example 1
Interval.fromISO('2022-11-07T09:00Z/2022-11-08T09:00Z').toLocaleString(); //=> 11/7/2022 – 11/8/2022
Example 2
Interval.fromISO('2022-11-07T09:00Z/2022-11-08T09:00Z').toLocaleString(DateTime.DATE_FULL); //=> November 7 – 8, 2022
Example 3
Interval.fromISO('2022-11-07T09:00Z/2022-11-08T09:00Z').toLocaleString(DateTime.DATE_FULL, { locale: 'fr-FR' }); //=> 7–8 novembre 2022
Example 4
Interval.fromISO('2022-11-07T17:00Z/2022-11-07T19:00Z').toLocaleString(DateTime.TIME_SIMPLE); //=> 6:00 – 8:00 PM
Example 5
Interval.fromISO("2022-11-07T17:00Z/2022-11-07T19:00Z").toLocaleString({ weekday: "short", month: "short", day: "2-digit", hour: "2-digit", minute: "2-digit", }); //=> Mon, Nov 07, 6:00 – 8:00 p
See Also
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat

method toString

toString: () => IfValid<string, 'Invalid Interval', IsValid>;

Returns a string representation of this Interval appropriate for debugging.

method union

union: (other: Interval) => IntervalMaybeValid;

Return an Interval representing the union of this Interval and the specified Interval. Specifically, the resulting Interval has the minimum start time and the maximum end time of the two Intervals.

method xor

static xor: (intervals: Interval[]) => IntervalMaybeValid[];

Return an array of Intervals representing the spans of time that only appear in one of the specified Intervals.

class InvalidZone

class InvalidZone extends Zone<false> {}

A zone that failed to parse. You should never need to instantiate this.

property isUniversal

readonly isUniversal: boolean;

property offsetFormat

readonly offsetFormat: string;

property type

readonly type: string;

class Settings

class Settings {}

Settings contains static getters and setters that control Luxon's overall behavior. Luxon is a simple library with few options, but the ones it does have live here.

property defaultLocale

static defaultLocale: string;

The default locale to create DateTimes with. Does not affect existing instances.

property defaultNumberingSystem

static defaultNumberingSystem: string;

The default numbering system to create DateTimes with. Does not affect existing instances.

property defaultOutputCalendar

static defaultOutputCalendar: string;

The default output calendar to create DateTimes with. Does not affect existing instances.

property defaultWeekSettings

static defaultWeekSettings: WeekSettings;

Allows overriding the default locale week settings, i.e. the start of the week, the weekend and how many days are required in the first week of a year. Does not affect existing instances.

property defaultZone

static defaultZone: Zone<true> | Zone<false>;

The default time zone object currently used to create DateTimes. Does not affect existing instances. The default value is the system's time zone (the one set on the machine that runs this code).

property now

static now: () => number;

Get the callback for returning the current timestamp.

property throwOnInvalid

static throwOnInvalid: boolean;

Whether Luxon will throw when it encounters invalid DateTimes, Durations, or Intervals
If setting this to true, be sure to opt-out of Luxon's invalid return types.
Example 1
Settings.throwOnInvalid = true; declare module 'luxon' { interface TSSettings { throwOnInvalid: true; } }

property twoDigitCutoffYear

static twoDigitCutoffYear: number;

The cutoff year after which a string encoding a year as two digits is interpreted to occur in the current century.

method resetCaches

static resetCaches: () => void;

Reset Luxon's global caches. Should only be necessary in testing scenarios.

class SystemZone

class SystemZone extends Zone<true> {}

Represents the system zone for this JavaScript environment.

property instance

static readonly instance: SystemZone;

Get a singleton instance of the system zone

class Zone

abstract class Zone<IsValid extends boolean = DefaultValidity> {}

property isUniversal

readonly isUniversal: boolean;

Returns whether the offset is known to be fixed for the whole year.

property isValid

readonly isValid: boolean;

Return whether this Zone is valid.

property name

readonly name: string;

The name of this zone.

property type

readonly type: string;

The type of zone

method equals

equals: (other: Zone) => IfValid<boolean, false, IsValid>;

Return whether this Zone is equal to another zone
Parameter other
the zone to compare

method formatOffset

formatOffset: (
    ts: number,
    format: ZoneOffsetFormat
) => IfValid<string, '', IsValid>;

Returns the offset's value as a string
Parameter ts
Epoch milliseconds for which to get the offset
Parameter format
What style of offset to return. Accepts 'narrow', 'short', or 'techie'. Returning '+6', '+06:00', or '+0600' respectively

method offset

offset: (ts: number) => IfValid<number, typeof NaN, IsValid>;

Return the offset in minutes for this zone at the specified timestamp.
Parameter ts
Epoch milliseconds for which to compute the offset

method offsetName

offsetName: (
    ts: number,
    options: ZoneOffsetOptions
) => IfValid<string, null, IsValid>;

Returns the offset's common name (such as EST) at the specified timestamp
Parameter ts
Epoch milliseconds for which to get the name
Parameter options
Options to affect the format
Parameter
options.format - What style of offset to return.
Parameter
options.locale - What locale to return the offset name in.

Interfaces

interface DateObjectUnits

interface DateObjectUnits {}

Note that ISO weekday and local weekday fields are mutually exclusive

property day

day?: number | undefined;

property hour

hour?: number | undefined;

property localWeekday

localWeekday?: WeekdayNumbers | undefined;

property localWeekNumber

localWeekNumber?: number | undefined;

property localWeekYear

localWeekYear?: number | undefined;

property millisecond

millisecond?: number | undefined;

property minute

minute?: number | undefined;

property month

month?: number | undefined;

property ordinal

ordinal?: number | undefined;

property second

second?: number | undefined;

property weekday

weekday?: WeekdayNumbers | undefined;

property weekNumber

weekNumber?: number | undefined;

property weekYear

weekYear?: number | undefined;

property year

year?: number | undefined;

interface DateTimeOptions

interface DateTimeOptions extends LocaleOptions {}

property setZone

setZone?: boolean | undefined;

Override the zone with a fixed-offset zone specified in the string itself, if it specifies one. false

property zone

zone?: string | Zone | undefined;

Use this zone if no offset is specified in the input string itself. Will also convert the time to this zone. local

interface DiffOptions

interface DiffOptions {}

property conversionAccuracy

conversionAccuracy?: ConversionAccuracy | undefined;

'casual'

interface DurationLikeObject

interface DurationLikeObject extends DurationObjectUnits {}

property day

day?: number | undefined;

property hour

hour?: number | undefined;

property millisecond

millisecond?: number | undefined;

property minute

minute?: number | undefined;

property month

month?: number | undefined;

property quarter

quarter?: number | undefined;

property second

second?: number | undefined;

property week

week?: number | undefined;

property year

year?: number | undefined;

interface DurationObjectUnits

interface DurationObjectUnits {}

property days

days?: number | undefined;

property hours

hours?: number | undefined;

property milliseconds

milliseconds?: number | undefined;

property minutes

minutes?: number | undefined;

property months

months?: number | undefined;

property quarters

quarters?: number | undefined;

property seconds

seconds?: number | undefined;

property weeks

weeks?: number | undefined;

property years

years?: number | undefined;

interface DurationOptions

interface DurationOptions {}

property conversionAccuracy

conversionAccuracy?: ConversionAccuracy | undefined;

property locale

locale?: string | undefined;

property numberingSystem

numberingSystem?: NumberingSystem | undefined;

interface ExplainedFormat

interface ExplainedFormat {}

property input

input: string;

property invalidReason

invalidReason?: string | undefined;

property matches

matches?: { [k: string]: any } | undefined;

property rawMatches

rawMatches?: RegExpMatchArray | null | undefined;

property regex

regex?: RegExp | undefined;

property result

result?: { [k: string]: any } | null | undefined;

property tokens

tokens: Array<{ literal: boolean; val: string }>;

property zone

zone?: Zone | null | undefined;

interface Features

interface Features {}

The set of available features in this environment. Some features of Luxon are not available in all environments.

property localeWeek

localeWeek: boolean;

Whether this environment supports different weekdays for the start of the week based on the locale

property relative

relative: boolean;

Whether this environment supports relative time formatting

interface InfoCalendarOptions

interface InfoCalendarOptions extends InfoUnitOptions {}

property outputCalendar

outputCalendar?: CalendarSystem | undefined;

gregory

interface InfoOptions

interface InfoOptions {}

property locale

locale?: string | undefined;

interface InfoUnitOptions

interface InfoUnitOptions extends InfoOptions {}

property numberingSystem

numberingSystem?: NumberingSystem | undefined;

interface IntervalObject

interface IntervalObject {}

property end

end?: DateTime | undefined;

property start

start?: DateTime | undefined;

interface LocaleOptions

interface LocaleOptions {}

property locale

locale?: string | undefined;

system's locale

property numberingSystem

numberingSystem?: NumberingSystem | undefined;

property outputCalendar

outputCalendar?: CalendarSystem | undefined;

interface ToHumanDurationOptions

interface ToHumanDurationOptions extends Intl.NumberFormatOptions {}

property listStyle

listStyle?: 'long' | 'short' | 'narrow' | undefined;

interface ToISODateOptions

interface ToISODateOptions {}

property format

format?: ToISOFormat | undefined;

Choose between the basic and extended format 'extended'

interface ToISOTimeDurationOptions

interface ToISOTimeDurationOptions {}

property format

format?: ToISOFormat | undefined;

Choose between the basic and extended format 'extended'

property includePrefix

includePrefix?: boolean | undefined;

Include the T prefix false

property suppressMilliseconds

suppressMilliseconds?: boolean | undefined;

Exclude milliseconds from the format if they are 0 false

property suppressSeconds

suppressSeconds?: boolean | undefined;

Exclude seconds from the format if they are 0 false

interface ToISOTimeOptions

interface ToISOTimeOptions extends ToISOTimeDurationOptions {}

property extendedZone

extendedZone?: boolean | undefined;

add the time zone format extension false

property includeOffset

includeOffset?: boolean | undefined;

Include the offset, such as 'Z' or '-04:00' true

interface ToRelativeCalendarOptions

interface ToRelativeCalendarOptions {}

property base

base?: DateTime | undefined;

The DateTime to use as the basis to which this time is compared now

property locale

locale?: string | undefined;

Override the locale of this DateTime

property numberingSystem

numberingSystem?: NumberingSystem | undefined;

Override the numberingSystem of this DateTime. The Intl system may choose not to honor this.

property unit

unit?: ToRelativeUnit | undefined;

If omitted, the method will pick the unit.

interface ToRelativeOptions

interface ToRelativeOptions extends Omit<ToRelativeCalendarOptions, 'unit'> {}

property padding

padding?: number | undefined;

Padding in milliseconds. This allows you to round up the result if it fits inside the threshold. Do not use this in combination with {round: false} because the decimal output will include the padding. 0

property round

round?: boolean | undefined;

true

property style

style?: StringUnitLength | undefined;

long

property unit

unit?: ToRelativeUnit | ToRelativeUnit[] | undefined;

A single unit or an array of units. If an array is supplied, the method will pick the best one to use from the array. If omitted, the method will pick the unit from a default set.

interface ToSQLOptions

interface ToSQLOptions {}

property includeOffset

includeOffset?: boolean | undefined;

Include the offset, such as 'Z' or '-04:00' true

property includeOffsetSpace

includeOffsetSpace?: boolean;

include the space between the time and the offset, such as '05:15:16.345 -04:00' true

property includeZone

includeZone?: boolean | undefined;

Include the zone, such as 'America/New_York'. Overrides includeOffset. false

interface TSSettings

interface TSSettings {}

TS only settings. Consumers can declaration merge this interface to change TS options.
See Also
- Settings.throwOnInvalid

interface WeekSettings

interface WeekSettings {}

property firstDay

firstDay: WeekdayNumbers;

property minimalDays

minimalDays: WeekdayNumbers;

property weekend

weekend: WeekdayNumbers[];

interface ZoneOffsetOptions

interface ZoneOffsetOptions {}

property format

format?: 'short' | 'long' | undefined;

What style of offset to return.

property locale

locale?: string | undefined;

What locale to return the offset name in.

interface ZoneOptions

interface ZoneOptions {}

property keepCalendarTime

keepCalendarTime?: boolean | undefined;

Deprecated
since 0.2.12. Use keepLocalTime instead

property keepLocalTime

keepLocalTime?: boolean | undefined;

If true, adjust the underlying time so that the local time stays the same, but in the target zone. You should rarely need this. Defaults to false.

Type Aliases

type CalendarSystem

type CalendarSystem = Intl.DateTimeFormatOptions extends { calendar?: infer T }
    ? T
    :
          | 'buddhist'
          | 'chinese'
          | 'coptic'
          | 'ethioaa'
          | 'ethiopic'
          | 'gregory'
          | 'hebrew'
          | 'indian'
          | 'islamic'
          | 'islamicc'
          | 'iso8601'
          | 'japanese'
          | 'persian'
          | 'roc';

type ConversionAccuracy

type ConversionAccuracy = 'casual' | 'longterm';

type CountOptions

type CountOptions = _UseLocaleWeekOption;

type DateInput

type DateInput = DateTime | DateObjectUnits | Date;

type DateTimeFormatOptions

type DateTimeFormatOptions = Intl.DateTimeFormatOptions;

type DateTimeFormatPreset

type DateTimeFormatPreset = Intl.DateTimeFormatOptions;

Deprecated
Use Intl.DateTimeFormatOptions instead.

type DateTimeFormatPresetValue

type DateTimeFormatPresetValue = 'numeric' | 'short' | 'long';

Deprecated
You should use Intl.DateTimeFormatOptions fields and values instead.

type DateTimeJSOptions

type DateTimeJSOptions = Omit<DateTimeOptions, 'setZone'>;

type DateTimeMaybeValid

type DateTimeMaybeValid = CanBeInvalid extends true
    ? DateTime<Valid> | DateTime<Invalid>
    : DateTime;

type DateTimeUnit

type DateTimeUnit =
    | 'year'
    | 'quarter'
    | 'month'
    | 'week'
    | 'day'
    | 'hour'
    | 'minute'
    | 'second'
    | 'millisecond';

type DayNumbers

type DayNumbers =
    | 1
    | 2
    | 3
    | 4
    | 5
    | 6
    | 7
    | 8
    | 9
    | 10
    | 11
    | 12
    | 13
    | 14
    | 15
    | 16
    | 17
    | 18
    | 19
    | 20
    | 21
    | 22
    | 23
    | 24
    | 25
    | 26
    | 27
    | 28
    | 29
    | 30
    | 31;

type DurationInput

type DurationInput = Duration | number | DurationLikeObject;

Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()
Deprecated
Use DurationLike instead.

type DurationLike

type DurationLike = Duration | DurationLikeObject | number;

Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()

type DurationMaybeValid

type DurationMaybeValid = CanBeInvalid extends true
    ? Duration<Valid> | Duration<Invalid>
    : Duration;

type DurationUnit

type DurationUnit = keyof DurationLikeObject;

type DurationUnits

type DurationUnits = DurationUnit | DurationUnit[];

type EndOfOptions

type EndOfOptions = _UseLocaleWeekOption;

type EraLength

type EraLength = StringUnitLength;

Deprecated

type HasSameOptions

type HasSameOptions = _UseLocaleWeekOption;

type HourCycle

type HourCycle = 'h11' | 'h12' | 'h23' | 'h24';

type HourNumbers

type HourNumbers =
    | 0
    | 1
    | 2
    | 3
    | 4
    | 5
    | 6
    | 7
    | 8
    | 9
    | 10
    | 11
    | 12
    | 13
    | 14
    | 15
    | 16
    | 17
    | 18
    | 19
    | 20
    | 21
    | 22
    | 23;

type IntervalMaybeValid

type IntervalMaybeValid = CanBeInvalid extends true
    ? Interval<Valid> | Interval<Invalid>
    : Interval;

type ISOTimeOptions

type ISOTimeOptions = ToISOTimeOptions;

Deprecated
alias for backwards compatibility

type MinuteNumbers

type MinuteNumbers = SecondNumbers;

type MonthNumbers

type MonthNumbers = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12;

type NumberingSystem

type NumberingSystem = Intl.DateTimeFormatOptions extends {
    numberingSystem?: infer T;
}
    ? T
    :
          | 'arab'
          | 'arabext'
          | 'bali'
          | 'beng'
          | 'deva'
          | 'fullwide'
          | 'gujr'
          | 'guru'
          | 'hanidec'
          | 'khmr'
          | 'knda'
          | 'laoo'
          | 'latn'
          | 'limb'
          | 'mlym'
          | 'mong'
          | 'mymr'
          | 'orya'
          | 'tamldec'
          | 'telu'
          | 'thai'
          | 'tibt';

type NumberUnitLength

type NumberUnitLength = 'numeric' | '2-digit';

type PossibleDaysInMonth

type PossibleDaysInMonth = 28 | 29 | 30 | 31;

type PossibleDaysInYear

type PossibleDaysInYear = 365 | 366;

type PossibleWeeksInYear

type PossibleWeeksInYear = 52 | 53;

type QuarterNumbers

type QuarterNumbers = 1 | 2 | 3 | 4;

type ResolvedLocaleOptions

type ResolvedLocaleOptions = Required<LocaleOptions>;

type SecondNumbers

type SecondNumbers =
    | 0
    | 1
    | 2
    | 3
    | 4
    | 5
    | 6
    | 7
    | 8
    | 9
    | 10
    | 11
    | 12
    | 13
    | 14
    | 15
    | 16
    | 17
    | 18
    | 19
    | 20
    | 21
    | 22
    | 23
    | 24
    | 25
    | 26
    | 27
    | 28
    | 29
    | 30
    | 31
    | 32
    | 33
    | 34
    | 35
    | 36
    | 37
    | 38
    | 39
    | 40
    | 41
    | 42
    | 43
    | 44
    | 45
    | 46
    | 47
    | 48
    | 49
    | 50
    | 51
    | 52
    | 53
    | 54
    | 55
    | 56
    | 57
    | 58
    | 59;

type StartOfOptions

type StartOfOptions = _UseLocaleWeekOption;

type StringUnitLength

type StringUnitLength = 'narrow' | 'short' | 'long';

type ToISOFormat

type ToISOFormat = 'basic' | 'extended';

type ToObjectOutput

type ToObjectOutput<
    IncludeConfig extends boolean | undefined = undefined,
    IsValid extends boolean | undefined = undefined
> = IsValid extends true
    ? _ToObjectOutput<IncludeConfig>
    : CanBeInvalid extends false
    ? _ToObjectOutput<IncludeConfig>
    : Partial<_ToObjectOutput<IncludeConfig>>;

type ToRelativeUnit

type ToRelativeUnit =
    | 'years'
    | 'quarters'
    | 'months'
    | 'weeks'
    | 'days'
    | 'hours'
    | 'minutes'
    | 'seconds';

type UnitLength

type UnitLength = StringUnitLength | NumberUnitLength;

type UnitOptions

type UnitOptions = InfoUnitOptions;

Deprecated

type WeekdayNumbers

type WeekdayNumbers = 1 | 2 | 3 | 4 | 5 | 6 | 7;

type WeekNumbers

type WeekNumbers =
    | 1
    | 2
    | 3
    | 4
    | 5
    | 6
    | 7
    | 8
    | 9
    | 10
    | 11
    | 12
    | 13
    | 14
    | 15
    | 16
    | 17
    | 18
    | 19
    | 20
    | 21
    | 22
    | 23
    | 24
    | 25
    | 26
    | 27
    | 28
    | 29
    | 30
    | 31
    | 32
    | 33
    | 34
    | 35
    | 36
    | 37
    | 38
    | 39
    | 40
    | 41
    | 42
    | 43
    | 44
    | 45
    | 46
    | 47
    | 48
    | 49
    | 50
    | 51
    | 52
    | 53;

type ZoneMaybeValid

type ZoneMaybeValid = CanBeInvalid extends true ? Zone<true> | Zone<false> : Zone;

type ZoneOffsetFormat

type ZoneOffsetFormat = 'narrow' | 'short' | 'techie';

What style of offset to return. Returning '+6', '+06:00', or '+0600' respectively

Namespaces

namespace Info

namespace Info {}

The Info class contains static methods for retrieving general time and date related data. For example, it has methods for finding out if a time zone has a DST, for listing the months in any supported locale, and for discovering which of Luxon features are available in the current environment.

function eras

eras: (length?: StringUnitLength, opts?: InfoOptions) => string[];

Return an array of eras, such as ['BC', 'AD']. The locale can be specified, but the calendar system is always Gregorian.
Parameter length
the length of the era representation. Defaults to 'short'.
Parameter opts
options
Parameter
opts.locale - the locale code
Example 1
Info.eras() //=> [ 'BC', 'AD' ]
Example 2
Info.eras('long') //=> [ 'Before Christ', 'Anno Domini' ]
Example 3
Info.eras('long', { locale: 'fr' }) //=> [ 'avant Jésus-Christ', 'après Jésus-Christ' ]

function features

features: () => Features;

Return the set of available features in this environment. Some features of Luxon are not available in all environments. For example, on older browsers, timezone support is not available. Use this function to figure out if that is the case.
Example 1
Info.features() //=> { intl: true, intlTokens: false, zones: true, relative: false }

function getMinimumDaysInFirstWeek

getMinimumDaysInFirstWeek: (input?: LocaleInput) => WeekdayNumbers;

Get the minimum number of days necessary in a week before it is considered part of the next year, according to the given locale.

function getStartOfWeek

getStartOfWeek: (input?: LocaleInput) => WeekdayNumbers;

Get the weekday on which the week starts, according to the given locale.

function getWeekendWeekdays

getWeekendWeekdays: (input?: LocaleInput) => WeekdayNumbers[];

Get the weekdays which are considered the weekend, according to the given locale.

function hasDST

hasDST: (zone?: string | Zone) => boolean;

Return whether the specified zone contains a DST.
Parameter zone
Zone to check. Defaults to the environment's local zone. Defaults to 'local'.

function isValidIANAZone

isValidIANAZone: (zone: string) => boolean;

Return whether the specified zone is a valid IANA specifier.
Parameter zone
Zone to check

function meridiems

meridiems: (opts?: InfoOptions) => string[];

Return an array of meridiems.
Parameter opts
options
Parameter
opts.locale - the locale code
Example 1
Info.meridiems() //=> [ 'AM', 'PM' ]
Example 2
Info.meridiems({ locale: 'my' }) //=> [ 'နံနက်', 'ညနေ' ]

function months

months: (length?: UnitLength, opts?: InfoCalendarOptions) => string[];

Return an array of standalone month names.
Parameter length
the length of the month representation. Defaults to 'long'.
Parameter opts
options
Parameter
opts.locale - the locale code
Parameter
opts.numberingSystem - the numbering system.
Parameter
opts.locObj - an existing locale object to use.
Parameter
opts.outputCalendar - the calendar. Defaults to 'gregory'.
Example 1
Info.months()[0] //=> 'January'
Example 2
Info.months('short')[0] //=> 'Jan'
Example 3
Info.months('numeric')[0] //=> '1'
Example 4
Info.months('short', { locale: 'fr-CA' } )[0] //=> 'janv.'
Example 5
Info.months('numeric', { locale: 'ar' })[0] //=> '١'
Example 6
Info.months('long', { outputCalendar: 'islamic' })[0] //=> 'Rabiʻ I'
See Also
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat

function monthsFormat

monthsFormat: (length?: UnitLength, opts?: InfoCalendarOptions) => string[];

Return an array of format month names. Format months differ from standalone months in that they are meant to appear next to the day of the month. In some languages, that changes the string. See Info#months
Parameter length
the length of the month representation. Defaults to 'long'.
Parameter opts
options
Parameter
opts.locale - the locale code
Parameter
opts.numberingSystem - the numbering system.
Parameter
opts.locObj - an existing locale object to use.
Parameter
opts.outputCalendar - the calendar. Defaults to 'gregory'.

function normalizeZone

normalizeZone: (input?: string | Zone | number) => Zone;

Converts the input into a Zone instance.
* If input is already a Zone instance, it is returned unchanged. * If input is a string containing a valid time zone name, a Zone instance with that name is returned. * If input is a string that doesn't refer to a known time zone, a Zone instance with Zone.isValid == false is returned. * If `input is a number, a Zone instance with the specified fixed offset in minutes is returned. * If input is null or undefined, the default zone is returned.
Parameter input
the value to be converted

function weekdays

weekdays: (length?: StringUnitLength, opts?: InfoUnitOptions) => string[];

Return an array of standalone week names.
Parameter length
the length of the weekday representation. Defaults to 'long'.
Parameter opts
options
Parameter
opts.locale - the locale code
Parameter
opts.numberingSystem - the numbering system.
Parameter
opts.locObj - an existing locale object to use.
Example 1
Info.weekdays()[0] //=> 'Monday'
Example 2
Info.weekdays('short')[0] //=> 'Mon'
Example 3
Info.weekdays('short', { locale: 'fr-CA' })[0] //=> 'lun.'
Example 4
Info.weekdays('short', { locale: 'ar' })[0] //=> 'الاثنين'
See Also
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat

function weekdaysFormat

weekdaysFormat: (length?: StringUnitLength, opts?: InfoUnitOptions) => string[];

Return an array of format week names. Format weekdays differ from standalone weekdays in that they are meant to appear next to more date information. In some languages, that changes the string. See Info#weekdays
Parameter length
the length of the month representation. Defaults to 'long'.
Parameter opts
options
Parameter
opts.locale - the locale code.
Parameter
opts.numberingSystem - the numbering system.
Parameter
opts.locObj - an existing locale object to use.

interface LocaleInput

interface LocaleInput {}

property locale

locale?: string | null | undefined;

the locale code

property locObj

locObj?: object | null | undefined;

an existing locale object to use, instead of the locale code string

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@types/luxon

Install

Overview

Index

Variables

Classes

Interfaces

Type Aliases

Namespaces

Variables

variable VERSION

Classes

class DateTime

property DATE_FULL

property DATE_HUGE

property DATE_MED

property DATE_MED_WITH_WEEKDAY

property DATE_SHORT

property DATETIME_FULL

property DATETIME_FULL_WITH_SECONDS

property DATETIME_HUGE

property DATETIME_HUGE_WITH_SECONDS

property DATETIME_MED

property DATETIME_MED_WITH_SECONDS

property DATETIME_MED_WITH_WEEKDAY

property DATETIME_SHORT

property DATETIME_SHORT_WITH_SECONDS

property day

Example 1

property daysInMonth

Example 1

Example 2

property daysInYear

Example 1

Example 2

property hour

Example 1

property invalidExplanation

property invalidReason

property isInDST

property isInLeapYear

Example 1

Example 2

property isOffsetFixed

property isValid

property isWeekend

property locale

property localWeekday

property localWeekNumber

property localWeekYear

property millisecond

Example 1

property minute

Example 1

property month

Example 1

property monthLong

Example 1

property monthShort

Example 1

property numberingSystem

property offset

Example 1

Example 2

property offsetNameLong

property offsetNameShort

property ordinal

Example 1

property outputCalendar

property quarter

Example 1

property second

Example 1

property TIME_24_SIMPLE

property TIME_24_WITH_LONG_OFFSET

property TIME_24_WITH_SECONDS

property TIME_24_WITH_SHORT_OFFSET

property TIME_SIMPLE

property TIME_WITH_LONG_OFFSET

property TIME_WITH_SECONDS