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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.
In these examples, we will be using this date:
RElet exampleDate = Js.Date.fromFloat(123456654321.0);
which is Thu, 29 Nov 1973 21:30:54 GMT. There is no particular significance to this date.
The code used to access this date is running in the Europe/Austria time zone with the en_US.utf8
locale.
In all of these functions, month values are in the range 0-11, where January is month zero.
t
type t;
valueOf
let valueOf: t => float;
Returns the primitive value of this date, equivalent to getTime()
. (See Date.valueOf
on MDN.)
REJs.Date.valueOf(exampleDate) == 123456654321.0;
make
let make: unit => t;
Returns a date representing the current time. See Date()
Constructor on MDN.
RElet now = Js.Date.make();
fromFloat
let fromFloat: float => t;
Returns a date representing the given argument, which is a number of milliseconds since the epoch. See Date()
Constructor on MDN.
REJs.Date.fromFloat(123456654321.0) == exampleDate;
fromString
let fromString: string => t;
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.
REJs.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
makeWithYM
let makeWithYM: (~year: float, ~month: float, unit) => t;
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.
RElet november1 = Js.Date.makeWithYM(~year=2020.0, ~month=10.0, ());
makeWithYMD
let makeWithYMD: (~year: float, ~month: float, ~date: float, unit) => t;
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.
makeWithYMDH
let makeWithYMDH: (~year: float, ~month: float, ~date: float, ~hours: float, unit) => t;
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.
makeWithYMDHM
let makeWithYMDHM: (~year: float, ~month: float, ~date: float, ~hours: float, ~minutes: float, unit) => t;
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.
makeWithYMDHMS
let makeWithYMDHMS: (~year: float, ~month: float, ~date: float, ~hours: float, ~minutes: float, ~seconds: float, unit) => t;
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.
REJs.Date.makeWithYMDHMS(~year=1973.0, ~month=11.0, ~date=29.0,
~hours=21.0, ~minutes=30.0, ~seconds=54.321, ()) == exampleDate;
utcWithYM
let utcWithYM: (~year: float, ~month: float, unit) => float;
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.
RElet november1 = Js.Date.utcWithYM(~year=2020.0, ~month=10.0, ());
utcWithYMD
let utcWithYMD: (~year: float, ~month: float, ~date: float, unit) => float;
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.
utcWithYMDH
let utcWithYMDH: (~year: float, ~month: float, ~date: float, ~hours: float, unit) => float;
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.
utcWithYMDHM
let utcWithYMDHM: (~year: float, ~month: float, ~date: float, ~hours: float, ~minutes: float, unit) => float;
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.
utcWithYMDHMS
let utcWithYMDHMS: (~year: float, ~month: float, ~date: float, ~hours: float, ~minutes: float, ~seconds: float, unit) => float;
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.
now
let now: unit => float;
Returns the current time as number of milliseconds since Unix epoch.
parse
let parse: string => t;
Deprecated. Use fromString()
.
parseAsFloat
let parseAsFloat: string => float;
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.
getDate
let getDate: t => float;
Returns the day of the month for its argument. The argument is evaluated in the current time zone. See Date.getDate
on MDN.
REJs.Date.getDate(exampleDate) == 29.0;
getDay
let getDay: t => float;
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.
REJs.Date.getDay(exampleDate) == 4.0;
getFullYear
let getFullYear: t => float;
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.
REJs.Date.getFullYear(exampleDate) == 1973.0;
getHours
let getHours: t => float;
Returns the hours for its argument, evaluated in the current time zone. See Date.getHours
on MDN.
REJs.Date.getHours(exampleDate) == 22.0; // Vienna is in GMT+01:00
getMilliseconds
let getMilliseconds: t => float;
Returns the number of milliseconds for its argument, evaluated in the current time zone. See Date.getMilliseconds
on MDN.
REJs.Date.getMilliseconds(exampleDate) == 321.0;
getMinutes
let getMinutes: t => float;
Returns the number of minutes for its argument, evaluated in the current time zone. See Date.getMinutes
on MDN.
REJs.Date.getMinutes(exampleDate) == 30.0;
getMonth
let getMonth: t => float;
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.
REJs.Date.getMonth(exampleDate) == 10.0;
getSeconds
let getSeconds: t => float;
Returns the seconds for its argument, evaluated in the current time zone. See Date.getSeconds
on MDN.
REJs.Date.getSeconds(exampleDate) == 54.0;
getTime
let getTime: t => float;
Returns the number of milliseconds since Unix epoch, evaluated in UTC. See Date.getTime
on MDN.
REJs.Date.getTime(exampleDate) == 123456654321.0
getTimezoneOffset
let getTimezoneOffset: t => float;
Returns the time zone offset in minutes from the current time zone to UTC. See Date.getTimezoneOffset
on MDN.
REJs.Date.getTimezoneOffset(exampleDate) == -60.0;
getUTCDate
let getUTCDate: t => float;
Returns the day of the month of the argument, evaluated in UTC. See Date.getUTCDate
on MDN.
REJs.Date.getUTCDate(exampleDate) == 29.0;
getUTCDay
let getUTCDay: t => float;
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.
REJs.Date.getUTCDay(exampleDate) == 4.0;
getUTCFullYear
let getUTCFullYear: t => float;
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.
REJs.Date.getUTCFullYear(exampleDate) == 1973.0;
getUTCHours
let getUTCHours: t => float;
Returns the hours for its argument, evaluated in the current time zone. See Date.getUTCHours
on MDN.
REJs.Date.getUTCHours(exampleDate) == 21.0;
getUTCMilliseconds
let getUTCMilliseconds: t => float;
Returns the number of milliseconds for its argument, evaluated in UTC. See Date.getUTCMilliseconds
on MDN.
REJs.Date.getUTCMilliseconds(exampleDate) == 321.0;
getUTCMinutes
let getUTCMinutes: t => float;
Returns the number of minutes for its argument, evaluated in UTC. See Date.getUTCMinutes
on MDN.
REJs.Date.getUTCMinutes(exampleDate) == 30.0;
getUTCMonth
let getUTCMonth: t => float;
Returns the month (0.0-11.0) for its argument, evaluated in UTC. January is month zero. See Date.getUTCMonth
on MDN.
REJs.Date.getUTCMonth(exampleDate) == 10.0;
getUTCSeconds
let getUTCSeconds: t => float;
Returns the seconds for its argument, evaluated in UTC. See Date.getUTCSeconds
on MDN.
REJs.Date.getUTCSeconds(exampleDate) == 54.0;
getYear
let getYear: t => float;
Deprecated. Use getFullYear()
instead.
setDate
let setDate: (t, float) => float;
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.
RElet 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);
setFullYear
let setFullYear: (t, float) => float;
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.
RElet 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);
setFullYearM
let setFullYearM: (t, ~year: float, ~month: float, unit) => float;
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.
RElet 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);
setFullYearMD
let setFullYearMD: (t, ~year: float, ~month: float, ~date: float, unit) => float;
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.
RElet 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);
setHours
let setHours: (t, float) => float;
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.
RElet 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);
setHoursM
let setHoursM: (t, ~hours: float, ~minutes: float, unit) => float;
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.
RElet 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);
setHoursMS
let setHoursMS: (t, ~hours: float, ~minutes: float, ~seconds: float, unit) => float;
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.
RElet 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);
setHoursMSMs
let setHoursMSMs: (t, ~hours: float, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setMilliseconds
let setMilliseconds: (t, float) => float;
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.
RElet 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);
setMinutes
let setMinutes: (t, float) => float;
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.
RElet 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);
setMinutesS
let setMinutesS: (t, ~minutes: float, ~seconds: float, unit) => float;
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.
RElet 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);
setMinutesSMs
let setMinutesSMs: (t, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setMonth
let setMonth: (t, float) => float;
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.
RElet 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);
setMonthD
let setMonthD: (t, ~month: float, ~date: float, unit) => float;
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.
RElet 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);
setSeconds
let setSeconds: (t, float) => float;
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.
RElet 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);
setSecondsMs
let setSecondsMs: (t, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setTime
let setTime: (t, float) => float;
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.
RElet 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);
setUTCDate
let setUTCDate: (t, float) => float;
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.
RElet 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);
setUTCFullYear
let setUTCFullYear: (t, float) => float;
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.
RElet 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);
setUTCFullYearM
let setUTCFullYearM: (t, ~year: float, ~month: float, unit) => float;
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.
RElet 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);
setUTCFullYearMD
let setUTCFullYearMD: (t, ~year: float, ~month: float, ~date: float, unit) => float;
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.
RElet 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);
setUTCHours
let setUTCHours: (t, float) => float;
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.
RElet 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);
setUTCHoursM
let setUTCHoursM: (t, ~hours: float, ~minutes: float, unit) => float;
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.
RElet 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);
setUTCHoursMS
let setUTCHoursMS: (t, ~hours: float, ~minutes: float, ~seconds: float, unit) => float;
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.
RElet 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);
setUTCHoursMSMs
let setUTCHoursMSMs: (t, ~hours: float, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setUTCMilliseconds
let setUTCMilliseconds: (t, float) => float;
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.
RElet 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);
setUTCMinutes
let setUTCMinutes: (t, float) => float;
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.
RElet 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);
setUTCMinutesS
let setUTCMinutesS: (t, ~minutes: float, ~seconds: float, unit) => float;
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.
RElet 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);
setUTCMinutesSMs
let setUTCMinutesSMs: (t, ~minutes: float, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setUTCMonth
let setUTCMonth: (t, float) => float;
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.
RElet 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);
setUTCMonthD
let setUTCMonthD: (t, ~month: float, ~date: float, unit) => float;
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.
RElet 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);
setUTCSeconds
let setUTCSeconds: (t, float) => float;
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.
RElet 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);
setUTCSecondsMs
let setUTCSecondsMs: (t, ~seconds: float, ~milliseconds: float, unit) => float;
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.
RElet 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);
setUTCTime
let setUTCTime: (t, float) => float;
Same as setTime()
.
setYear
let setYear: (t, float) => float;
Deprecated. Use setFullYear()
instead.
toDateString
let toDateString: t => string;
Returns the date (day of week, year, month, and day of month) portion of a Date
in English. See Date.toDateString
on MDN.
REJs.Date.toDateString(exampleDate) == "Thu Nov 29 1973";
toGMTString
let toGMTString: t => string;
Deprecated. Use toUTCString()
instead.
toISOString
let toISOString: t => string;
Returns a simplified version of the ISO 8601 format for the date. See Date.toISOString
on MDN.
REJs.Date.toISOString(exampleDate) == "1973-11-29T21:30:54.321Z";
toJSON
let toJSON: t => string;
Deprecated. This method is unsafe. It will be changed to return option
in a future release. Please use toJSONUnsafe()
instead.
toJSONUnsafe
let toJSONUnsafe: t => string;
Returns a string representation of the given date. See Date.toJSON
on MDN.
REJs.Date.toJSONUnsafe(exampleDate) == "1973-11-29T21:30:54.321Z";
toLocaleDateString
let toLocaleDateString: t => string;
Returns the year, month, and day for the given Date
in the current locale format. See Date.toLocaleDateString
on MDN.
REJs.Date.toLocaleDateString(exampleDate) == "11/29/1973"; // for en_US.utf8
Js.Date.toLocaleDateString(exampleDate) == "29.11.73"; // for de_DE.utf8
toLocaleString
let toLocaleString: t => string;
Returns the time and date for the given Date
in the current locale format. See Date.toLocaleString
on MDN.
REJs.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
toLocaleTimeString
let toLocaleTimeString: t => string;
Returns the time of day for the given Date
in the current locale format. See Date.toLocaleTimeString
on MDN.
REJs.Date.toLocaleString(exampleDate) == "10:30:54 PM"; // for en_US.utf8
Js.Date.toLocaleString(exampleDate) == "22:30:54"; // for de_DE.utf8
toString
let toString: t => string;
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.
REJs.Date.toString(exampleDate) == "Thu Nov 29 1973 22:30:54 GMT+0100 (Central European Standard Time)";
toTimeString
let toTimeString: t => string;
Returns a string representing the time of day for the given Date
in the current locale and time zone. See Date.toTimeString
on MDN.
REJs.Date.toTimeString(exampleDate) == "22:30:54 GMT+0100 (Central European Standard Time)";
toUTCString
let toUTCString: t => string;
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.
REJs.Date.toUTCString(exampleDate) == "Thu, 29 Nov 1973 21:30:54 GMT";