Js_date

Provide bindings to JS date. (See Date on MDN.) JavaScript stores dates as the number of milliseconds since the UNIX epoch, midnight 1 January 1970, UTC.

t

type t

valueOf

Returns the primitive value of this date, equivalent to getTime(). (See Date.valueOf on MDN.)

RES
Js.Date.valueOf(exampleDate) == 123456654321.0

let valueOf: t => float

make

Returns a date representing the current time. See Date() Constructor on MDN.

RES
let now = Js.Date.make()

let make: unit => t

fromFloat

Returns a date representing the given argument, which is a number of milliseconds since the epoch. See Date() Constructor on MDN.

RES
Js.Date.fromFloat(123456654321.0) == exampleDate

let fromFloat: float => t

fromString

Returns a Js.Date.t represented by the given string. The string can be in “IETF-compliant RFC 2822 timestamps, and also strings in a version of ISO8601.” Returns NaN if given an invalid date string. According to the Date() Constructor documentation on MDN, its use is discouraged.

RES
Js.Date.fromString("Thu, 29 Nov 1973 21:30:54.321 GMT") == exampleDate
Js.Date.fromString("1973-11-29T21:30:54.321Z00:00") == exampleDate
Js.Date.fromString("Thor, 32 Lok -19 60:70:80 XYZ") // returns NaN

let fromString: string => t

makeWithYM

Returns a date representing midnight of the first day of the given month and year in the current time zone. Fractional parts of arguments are ignored. See Date() Constructor on MDN.

RES
let november1 = Js.Date.makeWithYM(~year=2020.0, ~month=10.0, ())

let makeWithYM: (~year: float, ~month: float, unit) => t

makeWithYMD

Returns a date representing midnight of the given date of the given month and year in the current time zone. Fractional parts of arguments are ignored. See Date() Constructor on MDN.

let makeWithYMD: (~year: float, ~month: float, ~date: float, unit) => t

makeWithYMDH

Returns a date representing the given date of the given month and year, at zero minutes and zero seconds past the given hours, in the current time zone. Fractional parts of arguments are ignored. See Date() Constructor on MDN. Fractional parts of the arguments are ignored.

let makeWithYMDH: (~year: float, ~month: float, ~date: float, ~hours: float, unit) => t

makeWithYMDHM

Returns a date representing the given date of the given month and year, at zero seconds past the given time in hours and minutes in the current time zone. Fractional parts of arguments are ignored. See Date() Constructor on MDN.

let makeWithYMDHM: (\n  ~year: float,\n  ~month: float,\n  ~date: float,\n  ~hours: float,\n  ~minutes: float,\n  unit,\n) => t

makeWithYMDHMS

Returns a date representing the given date of the given month and year, at the given time in hours, minutes, and seconds in the current time zone. Fractional parts of arguments are ignored. See Date() Constructor on MDN.

RES
Js.Date.makeWithYMDHMS(
  ~year=1973.0,
  ~month=11.0,
  ~date=29.0,
  ~hours=21.0,
  ~minutes=30.0,
  ~seconds=54.321,
  (),
) == exampleDate

let makeWithYMDHMS: (\n  ~year: float,\n  ~month: float,\n  ~date: float,\n  ~hours: float,\n  ~minutes: float,\n  ~seconds: float,\n  unit,\n) => t

utcWithYM

Returns a float representing the number of milliseconds past the epoch for midnight of the first day of the given month and year in UTC. Fractional parts of arguments are ignored. See Date.UTC on MDN.

RES
let november1 = Js.Date.utcWithYM(~year=2020.0, ~month=10.0, ())

let utcWithYM: (~year: float, ~month: float, unit) => float

utcWithYMD

Returns a float representing the number of milliseconds past the epoch for midnight of the given date of the given month and year in UTC. Fractional parts of arguments are ignored. See Date.UTC on MDN.

let utcWithYMD: (~year: float, ~month: float, ~date: float, unit) => float

utcWithYMDH

Returns a float representing the number of milliseconds past the epoch for midnight of the given date of the given month and year, at zero minutes and seconds past the given hours in UTC. Fractional parts of arguments are ignored. See Date.UTC on MDN.

let utcWithYMDH: (~year: float, ~month: float, ~date: float, ~hours: float, unit) => float

utcWithYMDHM

Returns a float representing the number of milliseconds past the epoch for midnight of the given date of the given month and year, at zero seconds past the given number of minutes past the given hours in UTC. Fractional parts of arguments are ignored. See Date.UTC on MDN.

let utcWithYMDHM: (\n  ~year: float,\n  ~month: float,\n  ~date: float,\n  ~hours: float,\n  ~minutes: float,\n  unit,\n) => float

utcWithYMDHMS

Returns a float representing the number of milliseconds past the epoch for midnight of the given date of the given month and year, at the given time in hours, minutes and seconds in UTC. Fractional parts of arguments are ignored.

See Date.UTC on MDN.

let utcWithYMDHMS: (\n  ~year: float,\n  ~month: float,\n  ~date: float,\n  ~hours: float,\n  ~minutes: float,\n  ~seconds: float,\n  unit,\n) => float

now

Returns the current time as number of milliseconds since Unix epoch.

let now: unit => float

parse

let parse: string => t

parseAsFloat

Returns a float with the number of milliseconds past the epoch represented by the given string. The string can be in “IETF-compliant RFC 2822 timestamps, and also strings in a version of ISO8601.” Returns NaN if given an invalid date string. According to the Date.parse documentation on MDN, its use is discouraged. Returns NaN if passed invalid date string.

let parseAsFloat: string => float

getDate

Returns the day of the month for its argument. The argument is evaluated in the current time zone. See Date.getDate on MDN.

RES
Js.Date.getDate(exampleDate) == 29.0

let getDate: t => float

getDay

Returns the day of the week (0.0-6.0) for its argument, where 0.0 represents Sunday. The argument is evaluated in the current time zone. See Date.getDay on MDN.

RES
Js.Date.getDay(exampleDate) == 4.0

let getDay: t => float

getFullYear

Returns the full year (as opposed to the range 0-99) for its argument. The argument is evaluated in the current time zone. See Date.getFullYear on MDN.

RES
Js.Date.getFullYear(exampleDate) == 1973.0

let getFullYear: t => float

getHours

Returns the hours for its argument, evaluated in the current time zone. See Date.getHours on MDN.

RES
Js.Date.getHours(exampleDate) == 22.0 // Vienna is in GMT+01:00

let getHours: t => float

getMilliseconds

Returns the number of milliseconds for its argument, evaluated in the current time zone. See Date.getMilliseconds on MDN.

RES
Js.Date.getMilliseconds(exampleDate) == 321.0

let getMilliseconds: t => float

getMinutes

Returns the number of minutes for its argument, evaluated in the current time zone. See Date.getMinutes on MDN.

RES
Js.Date.getMinutes(exampleDate) == 30.0

let getMinutes: t => float

getMonth

Returns the month (0.0-11.0) for its argument, evaluated in the current time zone. January is month zero. See Date.getMonth on MDN.

RES
Js.Date.getMonth(exampleDate) == 10.0

let getMonth: t => float

getSeconds

Returns the seconds for its argument, evaluated in the current time zone. See Date.getSeconds on MDN.

RES
Js.Date.getSeconds(exampleDate) == 54.0

let getSeconds: t => float

getTime

Returns the number of milliseconds since Unix epoch, evaluated in UTC. See Date.getTime on MDN.

RES
Js.Date.getTime(exampleDate) == 123456654321.0

let getTime: t => float

getTimezoneOffset

Returns the time zone offset in minutes from the current time zone to UTC. See Date.getTimezoneOffset on MDN.

RES
Js.Date.getTimezoneOffset(exampleDate) == -60.0

let getTimezoneOffset: t => float

getUTCDate

Returns the day of the month of the argument, evaluated in UTC. See Date.getUTCDate on MDN.

RES
Js.Date.getUTCDate(exampleDate) == 29.0

let getUTCDate: t => float

getUTCDay

Returns the day of the week of the argument, evaluated in UTC. The range of the return value is 0.0-6.0, where Sunday is zero. See Date.getUTCDay on MDN.

RES
Js.Date.getUTCDay(exampleDate) == 4.0

let getUTCDay: t => float

getUTCFullYear

Returns the full year (as opposed to the range 0-99) for its argument. The argument is evaluated in UTC. See Date.getUTCFullYear on MDN.

RES
Js.Date.getUTCFullYear(exampleDate) == 1973.0

let getUTCFullYear: t => float

getUTCHours

Returns the hours for its argument, evaluated in the current time zone. See Date.getUTCHours on MDN.

RES
Js.Date.getUTCHours(exampleDate) == 21.0

let getUTCHours: t => float

getUTCMilliseconds

Returns the number of milliseconds for its argument, evaluated in UTC. See Date.getUTCMilliseconds on MDN.

RES
Js.Date.getUTCMilliseconds(exampleDate) == 321.0

let getUTCMilliseconds: t => float

getUTCMinutes

Returns the number of minutes for its argument, evaluated in UTC. See Date.getUTCMinutes on MDN.

RES
Js.Date.getUTCMinutes(exampleDate) == 30.0

let getUTCMinutes: t => float

getUTCMonth

Returns the month (0.0-11.0) for its argument, evaluated in UTC. January is month zero. See Date.getUTCMonth on MDN.

RES
Js.Date.getUTCMonth(exampleDate) == 10.0

let getUTCMonth: t => float

getUTCSeconds

Returns the seconds for its argument, evaluated in UTC. See Date.getUTCSeconds on MDN.

RES
Js.Date.getUTCSeconds(exampleDate) == 54.0

let getUTCSeconds: t => float

getYear

let getYear: t => float

setDate

Sets the given Date’s day of month to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setDate on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let twoWeeksBefore = Js.Date.setDate(date1, 15.0)
date1 == Js.Date.fromString("1973-11-15T21:30:54.321Z00:00")
twoWeeksBefore == Js.Date.getTime(date1)

let setDate: (t, float) => float

setFullYear

Sets the given Date’s year to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let nextYear = Js.Date.setFullYear(date1, 1974.0)
date1 == Js.Date.fromString("1974-11-15T21:30:54.321Z00:00")
nextYear == Js.Date.getTime(date1)

let setFullYear: (t, float) => float

setFullYearM

Sets the given Date’s year and month to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let future = Js.Date.setFullYearM(date1, ~year=1974.0, ~month=0.0, ())
date1 == Js.Date.fromString("1974-01-22T21:30:54.321Z00:00")
future == Js.Date.getTime(date1)

let setFullYearM: (t, ~year: float, ~month: float, unit) => float

setFullYearMD

Sets the given Date’s year, month, and day of month to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let future = Js.Date.setFullYearMD(date1, ~year=1974.0, ~month=0.0, ~date=7.0, ())
date1 == Js.Date.fromString("1974-01-07T21:30:54.321Z00:00")
future == Js.Date.getTime(date1)

let setFullYearMD: (t, ~year: float, ~month: float, ~date: float, unit) => float

setHours

Sets the given Date’s hours to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let nextHour = Js.Date.setHours(date1, 22.0)
date1 == Js.Date.fromString("1973-11-29T22:30:54.321Z00:00")
nextHour == Js.Date.getTime(date1)

let setHours: (t, float) => float

setHoursM

Sets the given Date’s hours and minutes to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setHoursM(date1, ~hours=22.0, ~minutes=46.0, ())
date1 == Js.Date.fromString("1973-11-29T22:46:54.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setHoursM: (t, ~hours: float, ~minutes: float, unit) => float

setHoursMS

Sets the given Date’s hours, minutes, and seconds to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setHoursMS(date1, ~hours=22.0, ~minutes=46.0, ~seconds=37.0, ())
date1 == Js.Date.fromString("1973-11-29T22:46:37.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setHoursMS: (t, ~hours: float, ~minutes: float, ~seconds: float, unit) => float

setHoursMSMs

Sets the given Date’s hours, minutes, seconds, and milliseconds to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setHoursMSMs(
  date1,
  ~hours=22.0,
  ~minutes=46.0,
  ~seconds=37.0,
  ~milliseconds=494.0,
  (),
)
date1 == Js.Date.fromString("1973-11-29T22:46:37.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setHoursMSMs: (\n  t,\n  ~hours: float,\n  ~minutes: float,\n  ~seconds: float,\n  ~milliseconds: float,\n  unit,\n) => float

setMilliseconds

Sets the given Date’s milliseconds to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMilliseconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMilliseconds(date1, 494.0)
date1 == Js.Date.fromString("1973-11-29T21:30:54.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setMilliseconds: (t, float) => float

setMinutes

Sets the given Date’s minutes to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMinutes(date1, 34.0)
date1 == Js.Date.fromString("1973-11-29T21:34:54.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setMinutes: (t, float) => float

setMinutesS

Sets the given Date’s minutes and seconds to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMinutesS(date1, ~minutes=34.0, ~seconds=56.0, ())
date1 == Js.Date.fromString("1973-11-29T21:34:56.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setMinutesS: (t, ~minutes: float, ~seconds: float, unit) => float

setMinutesSMs

Sets the given Date’s minutes, seconds, and milliseconds to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMinutesSMs(
  date1,
  ~minutes=34.0,
  ~seconds=56.0,
  ~milliseconds=789.0,
  (),
)
date1 == Js.Date.fromString("1973-11-29T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setMinutesSMs: (t, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float

setMonth

Sets the given Date’s month to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMonth on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMonth(date1, 11.0)
date1 == Js.Date.fromString("1973-12-29T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setMonth: (t, float) => float

setMonthD

Sets the given Date’s month and day of month to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setMonth on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setMonthD(date1, ~month=11.0, ~date=8.0, ())
date1 == Js.Date.fromString("1973-12-08T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setMonthD: (t, ~month: float, ~date: float, unit) => float

setSeconds

Sets the given Date’s seconds to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setSeconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setSeconds(date1, 56.0)
date1 == Js.Date.fromString("1973-12-29T21:30:56.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setSeconds: (t, float) => float

setSecondsMs

Sets the given Date’s seconds and milliseconds to the values in the labeled arguments according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setSeconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setSecondsMs(date1, ~seconds=56.0, ~milliseconds=789.0, ())
date1 == Js.Date.fromString("1973-12-29T21:30:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setSecondsMs: (t, ~seconds: float, ~milliseconds: float, unit) => float

setTime

Sets the given Date’s value in terms of milliseconds since the epoch. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setTime on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setTime(date1, 198765432101.0)

date1 == Js.Date.fromString("1976-04-19T12:37:12.101Z00:00")
futureTime == Js.Date.getTime(date1)

let setTime: (t, float) => float

setUTCDate

Sets the given Date’s day of month to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCDate on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let twoWeeksBefore = Js.Date.setUTCDate(date1, 15.0)
date1 == Js.Date.fromString("1973-11-15T21:30:54.321Z00:00")
twoWeeksBefore == Js.Date.getTime(date1)

let setUTCDate: (t, float) => float

setUTCFullYear

Sets the given Date’s year to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let nextYear = Js.Date.setUTCFullYear(date1, 1974.0)
date1 == Js.Date.fromString("1974-11-15T21:30:54.321Z00:00")
nextYear == Js.Date.getTime(date1)

let setUTCFullYear: (t, float) => float

setUTCFullYearM

Sets the given Date’s year and month to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let future = Js.Date.setUTCFullYearM(date1, ~year=1974.0, ~month=0.0, ())
date1 == Js.Date.fromString("1974-01-22T21:30:54.321Z00:00")
future == Js.Date.getTime(date1)

let setUTCFullYearM: (t, ~year: float, ~month: float, unit) => float

setUTCFullYearMD

Sets the given Date’s year, month, and day of month to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCFullYear on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let future = Js.Date.setUTCFullYearMD(date1, ~year=1974.0, ~month=0.0, ~date=7.0, ())
date1 == Js.Date.fromString("1974-01-07T21:30:54.321Z00:00")
future == Js.Date.getTime(date1)

let setUTCFullYearMD: (t, ~year: float, ~month: float, ~date: float, unit) => float

setUTCHours

Sets the given Date’s hours to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let nextHour = Js.Date.setUTCHours(date1, 22.0)
date1 == Js.Date.fromString("1973-11-29T22:30:54.321Z00:00")
nextHour == Js.Date.getTime(date1)

let setUTCHours: (t, float) => float

setUTCHoursM

Sets the given Date’s hours and minutes to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCHoursM(date1, ~hours=22.0, ~minutes=46.0, ())
date1 == Js.Date.fromString("1973-11-29T22:46:54.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCHoursM: (t, ~hours: float, ~minutes: float, unit) => float

setUTCHoursMS

Sets the given Date’s hours, minutes, and seconds to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date.

See Date.setUTCHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCHoursMS(date1, ~hours=22.0, ~minutes=46.0, ~seconds=37.0, ())
date1 == Js.Date.fromString("1973-11-29T22:46:37.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCHoursMS: (t, ~hours: float, ~minutes: float, ~seconds: float, unit) => float

setUTCHoursMSMs

Sets the given Date’s hours, minutes, seconds, and milliseconds to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCHours on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCHoursMSMs(
  date1,
  ~hours=22.0,
  ~minutes=46.0,
  ~seconds=37.0,
  ~milliseconds=494.0,
  (),
)
date1 == Js.Date.fromString("1973-11-29T22:46:37.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCHoursMSMs: (\n  t,\n  ~hours: float,\n  ~minutes: float,\n  ~seconds: float,\n  ~milliseconds: float,\n  unit,\n) => float

setUTCMilliseconds

Sets the given Date’s milliseconds to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMilliseconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMilliseconds(date1, 494.0)
date1 == Js.Date.fromString("1973-11-29T21:30:54.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMilliseconds: (t, float) => float

setUTCMinutes

Sets the given Date’s minutes to the value in the second argument according to the current time zone. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMinutes(date1, 34.0)
date1 == Js.Date.fromString("1973-11-29T21:34:54.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMinutes: (t, float) => float

setUTCMinutesS

Sets the given Date’s minutes and seconds to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMinutesS(date1, ~minutes=34.0, ~seconds=56.0, ())
date1 == Js.Date.fromString("1973-11-29T21:34:56.494Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMinutesS: (t, ~minutes: float, ~seconds: float, unit) => float

setUTCMinutesSMs

Sets the given Date’s minutes, seconds, and milliseconds to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMinutes on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMinutesSMs(
  date1,
  ~minutes=34.0,
  ~seconds=56.0,
  ~milliseconds=789.0,
  (),
)
date1 == Js.Date.fromString("1973-11-29T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMinutesSMs: (t, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float

setUTCMonth

Sets the given Date’s month to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMonth on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMonth(date1, 11.0)
date1 == Js.Date.fromString("1973-12-29T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMonth: (t, float) => float

setUTCMonthD

Sets the given Date’s month and day of month to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCMonth on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCMonthD(date1, ~month=11.0, ~date=8.0, ())
date1 == Js.Date.fromString("1973-12-08T21:34:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCMonthD: (t, ~month: float, ~date: float, unit) => float

setUTCSeconds

Sets the given Date’s seconds to the value in the second argument according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCSeconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCSeconds(date1, 56.0)
date1 == Js.Date.fromString("1973-12-29T21:30:56.321Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCSeconds: (t, float) => float

setUTCSecondsMs

Sets the given Date’s seconds and milliseconds to the values in the labeled arguments according to UTC. Returns the number of milliseconds since the epoch of the updated Date. This function modifies the original Date. See Date.setUTCSeconds on MDN.

RES
let date1 = Js.Date.fromFloat(123456654321.0) // 29 November 1973 21:30:54.321 GMT
let futureTime = Js.Date.setUTCSecondsMs(date1, ~seconds=56.0, ~milliseconds=789.0, ())
date1 == Js.Date.fromString("1973-12-29T21:30:56.789Z00:00")
futureTime == Js.Date.getTime(date1)

let setUTCSecondsMs: (t, ~seconds: float, ~milliseconds: float, unit) => float

setUTCTime

Same as setTime().

let setUTCTime: (t, float) => float

setYear

let setYear: (t, float) => float

toDateString

Returns the date (day of week, year, month, and day of month) portion of a Date in English. See Date.toDateString on MDN.

RES
Js.Date.toDateString(exampleDate) == "Thu Nov 29 1973"

let toDateString: t => string

toGMTString

let toGMTString: t => string

toISOString

Returns a simplified version of the ISO 8601 format for the date. See Date.toISOString on MDN.

RES
Js.Date.toISOString(exampleDate) == "1973-11-29T21:30:54.321Z"

let toISOString: t => string

toJSON

let toJSON: t => string

toJSONUnsafe

Returns a string representation of the given date. See Date.toJSON on MDN.

let toJSONUnsafe: t => string

toLocaleDateString

Returns the year, month, and day for the given Date in the current locale format. See Date.toLocaleDateString on MDN.

RES
Js.Date.toLocaleDateString(exampleDate) == "11/29/1973" // for en_US.utf8
Js.Date.toLocaleDateString(exampleDate) == "29.11.73" // for de_DE.utf8

let toLocaleDateString: t => string

toLocaleString

Returns the time and date for the given Date in the current locale format. See Date.toLocaleString on MDN.

RES
Js.Date.toLocaleString(exampleDate) == "11/29/1973, 10:30:54 PM" // for en_US.utf8
Js.Date.toLocaleString(exampleDate) == "29.11.1973, 22:30:54" // for de_DE.utf8

let toLocaleString: t => string

toLocaleTimeString

Returns the time of day for the given Date in the current locale format. See Date.toLocaleTimeString on MDN.

RES
Js.Date.toLocaleString(exampleDate) == "10:30:54 PM" // for en_US.utf8
Js.Date.toLocaleString(exampleDate) == "22:30:54" // for de_DE.utf8

let toLocaleTimeString: t => string

toString

Returns a string representing the date and time of day for the given Date in the current locale and time zone. See Date.toString on MDN.

RES
Js.Date.toString(
  exampleDate,
) == "Thu Nov 29 1973 22:30:54 GMT+0100 (Central European Standard Time)"

let toString: t => string

toTimeString

Returns a string representing the time of day for the given Date in the current locale and time zone. See Date.toTimeString on MDN.

RES
Js.Date.toTimeString(exampleDate) == "22:30:54 GMT+0100 (Central European Standard Time)"

let toTimeString: t => string

toUTCString

Returns a string representing the date and time of day for the given Date in the current locale and UTC (GMT time zone). See Date.toUTCString on MDN.

RES
Js.Date.toUTCString(exampleDate) == "Thu, 29 Nov 1973 21:30:54 GMT"

let toUTCString: t => string