Dates - DatetimeAPI reference for datetime, an exact moment with a zone to read it inclockAPI Reference
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Dates - Datetime

An exact moment with a zone to read it in, one type for timestamps, appointments and deadlines. The class is DateTime, a Temporal.ZonedDateTime underneath.

Creating

datetime

datetime(input);
datetime(input, zone);
datetime(input, { zone, loose, dayFirst });

Reads an ISO string, a Date, epoch milliseconds, a fields object, a date, or a Temporal value. A missing value refuses, now() reads the current moment.

Parameters

Name Type Description
input string | Date | number | object | CalendarDate | Temporal '2026-09-06T14:30Z' as an instant, '2026-09-06T14:30' as a wall clock in the zone, '2026-09-06' as midnight, a Date, epoch milliseconds, { year, month, day, hour }, a date at its midnight, or a Temporal value
zone string The zone to read in, else a bracketed zone in the string, else the configured default, else the machine’s
options object { zone, loose, dayFirst }. See Reading Values

Returns

A DateTime, or null under { loose: true } for input that cannot be read.

Usage

datetime('2026-09-06T14:30Z', 'America/New_York').format('long'); // 'September 6, 2026 at 10:30 AM'
datetime('2026-09-06T14:30', 'Asia/Tokyo').toString(); // '2026-09-06T05:30:00.000Z'
datetime('2026-09-06', 'UTC').toString(); // '2026-09-06T00:00:00.000Z'
datetime('2026-09-06T14:30:00+09:00[Asia/Tokyo]').zone; // 'Asia/Tokyo'
datetime(0, 'UTC').toString(); // '1970-01-01T00:00:00.000Z'
datetime({ year: 2026, month: 9, day: 6, hour: 9 }, 'UTC').toString(); // '2026-09-06T09:00:00.000Z'

Example

now

now();
now(zone);

The current moment at millisecond precision, in the zone or the configured default.

Parameters

Name Type Description
zone string The zone to read in

Returns

A DateTime.

Usage

now().format(); // 'Sep 7, 2026, 6:14 PM'
now('Asia/Tokyo').zone; // 'Asia/Tokyo'
now().microsecond; // 0

Example

startOfToday

startOfToday();
startOfToday(zone);

Midnight today, now(zone).startOf('day'). The lower bound a query for today writes.

Parameters

Name Type Description
zone string The zone whose today counts

Returns

A DateTime.

Usage

startOfToday().equals(now().startOf('day')); // true
startOfToday('Asia/Tokyo').hour; // 0

Example

endOfToday

endOfToday();
endOfToday(zone);

The last millisecond of today, now(zone).endOf('day'). For a query bound prefer now(zone).range('day'), whose end is the next midnight.

Parameters

Name Type Description
zone string The zone whose today counts

Returns

A DateTime.

Usage

endOfToday().hour; // 23
endOfToday().millisecond; // 999
endOfToday('Asia/Tokyo').format('HH:mm:ss.SSS z'); // '23:59:59.999 GMT+9'

Example

Properties

The parts are real properties, so a value prints them in a console without a click, and text leads them in the configured locale’s common form, so a preview reads as a date. Every property is read-only.

Name Type Description
text string The value in the configured locale’s common form, 'Sep 6, 2026, 2:30 PM EDT', what format('text') prints
month number 1 through 12
day number
year number
weekday number ISO, 1 for monday through 7 for sunday
hour number
minute number
second number
millisecond number
microsecond number
nanosecond number
zone string The canonical zone id, 'America/New_York'
offset string The UTC offset in effect, '-04:00'
epoch number Epoch milliseconds
epochNanoseconds bigint The exact instant as epoch nanoseconds, the key two datetimes a nanosecond apart still tell apart on
quarter number 1 through 4
dayOfYear number
weekOfYear number ISO week number
daysInMonth number
daysInYear number
hoursInDay number 23, 24 or 25 across a daylight saving change
date CalendarDate The calendar date in this zone
time Time The time of day in this zone

Usage

const moment = datetime('2026-09-06T14:30:15.250', 'America/New_York');


moment.text; // 'Sep 6, 2026, 2:30 PM EDT'
moment.year; // 2026
moment.weekday; // 7
moment.zone; // 'America/New_York'
moment.offset; // '-04:00'
moment.epoch; // 1788719415250
moment.date.toString(); // '2026-09-06'
moment.time.toString(); // '14:30:15.250'

Example

Moving

plus

datetime.plus(duration);
datetime.plus(fields);
datetime.plus(phrase);
datetime.plus(count, unit);

Adds a duration. Adding days keeps the wall clock across a daylight saving change, adding hours counts hours.

Parameters

Name Type Description
amount Duration | object | string | number A duration, a fields object like { days: 3 }, a phrase like '1h 30m', or a count with a unit. A count written as text reads as its number
unit string The unit for a count, 'days', 'hours', 'weeks'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:30', 'UTC');


moment.plus(days(3)).toString(); // '2026-09-09T14:30:00.000Z'
moment.plus({ hours: 1, minutes: 30 }).toString(); // '2026-09-06T16:00:00.000Z'
moment.plus('1h 30m').toString(); // '2026-09-06T16:00:00.000Z'
moment.plus(2, 'weeks').toString(); // '2026-09-20T14:30:00.000Z'


const friday = datetime('2026-03-06T17:00', 'America/New_York');
friday.plus(days(3)).format('dddd h:mm a'); // 'Monday 5:00 pm'
friday.plus(hours(72)).format('dddd h:mm a'); // 'Monday 6:00 pm'

Example

minus

datetime.minus(duration);
datetime.minus(fields);
datetime.minus(phrase);
datetime.minus(count, unit);

Subtracts a duration, in the same spellings plus() takes.

Parameters

Name Type Description
amount Duration | object | string | number A duration, a fields object, a phrase, or a count with a unit
unit string The unit for a count

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:30', 'UTC');


moment.minus(months(1)).toString(); // '2026-08-06T14:30:00.000Z'
moment.minus('45m').toString(); // '2026-09-06T13:45:00.000Z'
moment.minus(1, 'year').toString(); // '2025-09-06T14:30:00.000Z'

Example

set

datetime.set(fields);
datetime.set(unit, value);

Replaces parts. A part out of range refuses with cannotSet rather than rolling over, the way the factory refuses one.

Parameters

Name Type Description
fields object Singular keys, { hour: 9, minute: 0 }
unit string One part to replace, 'year', 'hour'
value number Its new value

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:30', 'UTC');


moment.set({ hour: 9, minute: 0 }).toString(); // '2026-09-06T09:00:00.000Z'
moment.set('year', 2030).toString(); // '2030-09-06T14:30:00.000Z'
moment.set('minute', 60); // throws cannotSet

Example

at

datetime.at(time);

The same date and zone at another time of day.

Parameters

Name Type Description
time string | Time | object Anything time() reads, '9am', '17:45'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:30', 'America/New_York');


moment.at('9am').format('long'); // 'September 6, 2026 at 9:00 AM'
moment.at('17:45').toString(); // '2026-09-06T21:45:00.000Z'

Example

in

datetime.in(zone);

The same instant read in another zone. The zone may be an IANA name, a city, an abbreviation, an offset or a configured alias. See Zones.

Parameters

Name Type Description
zone string The zone to read in

Returns

A new DateTime for the same instant.

Usage

const moment = datetime('2026-09-06T14:30Z', 'UTC');


moment.in('America/New_York').format('long'); // 'September 6, 2026 at 10:30 AM'
moment.in('Berlin').zone; // 'Europe/Berlin'
moment.in('PT').zone; // 'America/Los_Angeles'
moment.in('Asia/Tokyo').equals(moment); // true

Example

startOf

datetime.startOf(unit);
datetime.startOf('week', firstDay);

The first instant of the unit around this moment. A week starts on the configured first day, or on firstDay.

Parameters

Name Type Description
unit string 'year', 'quarter', 'month', 'week', 'day', 'hour', 'minute', 'second'
firstDay string | number The weekday a week starts on, for 'week'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:37:42', 'UTC');


moment.startOf('day').toString(); // '2026-09-06T00:00:00.000Z'
moment.startOf('quarter').toString(); // '2026-07-01T00:00:00.000Z'
moment.startOf('week').toString(); // '2026-08-31T00:00:00.000Z'
moment.startOf('week', 'sunday').toString(); // '2026-09-06T00:00:00.000Z'

Example

endOf

datetime.endOf(unit);
datetime.endOf('week', firstDay);

The last millisecond of the unit around this moment. For a query bound prefer range(unit), whose end is the next start.

Parameters

Name Type Description
unit string 'year', 'quarter', 'month', 'week', 'day', 'hour', 'minute', 'second'
firstDay string | number The weekday a week starts on, for 'week'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:37:42', 'UTC');


moment.endOf('day').toString(); // '2026-09-06T23:59:59.999Z'
moment.endOf('month').toString(); // '2026-09-30T23:59:59.999Z'

Example

round

datetime.round(unit);
datetime.round(increment, unit);

Rounds to the nearest unit or increment. The wall clock snaps, so on the repeated hour of a fall-back night it lands on the second pass.

Parameters

Name Type Description
increment number A count of the unit to snap to, 15 for quarter hours
unit string 'day', 'hour', 'minute', 'second', 'millisecond'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:37:42', 'UTC');


moment.round('hour').toString(); // '2026-09-06T15:00:00.000Z'
moment.round(15, 'minutes').toString(); // '2026-09-06T14:45:00.000Z'

Example

floor

datetime.floor(unit);
datetime.floor(increment, unit);

Rounds down to a unit or increment.

Parameters

Name Type Description
increment number A count of the unit to snap to
unit string 'day', 'hour', 'minute', 'second', 'millisecond'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:37:42', 'UTC');


moment.floor('hour').toString(); // '2026-09-06T14:00:00.000Z'
moment.floor(15, 'minutes').toString(); // '2026-09-06T14:30:00.000Z'

Example

ceil

datetime.ceil(unit);
datetime.ceil(increment, unit);

Rounds up to a unit or increment.

Parameters

Name Type Description
increment number A count of the unit to snap to
unit string 'day', 'hour', 'minute', 'second', 'millisecond'

Returns

A new DateTime.

Usage

const moment = datetime('2026-09-06T14:37:42', 'UTC');


moment.ceil('hour').toString(); // '2026-09-06T15:00:00.000Z'
moment.ceil(15, 'minutes').toString(); // '2026-09-06T14:45:00.000Z'

Example

next

datetime.next(weekday);

The next such weekday strictly after this moment, at the same time of day.

Parameters

Name Type Description
weekday string | number A name in any spelling, 'friday', 'Fri', or the ISO number, 1 for monday through 7 for sunday

Returns

A new DateTime.

Usage

const sunday = datetime('2026-09-06T14:30', 'UTC');


sunday.next('friday').toString(); // '2026-09-11T14:30:00.000Z'
sunday.next('sunday').toString(); // '2026-09-13T14:30:00.000Z'

Example

previous

datetime.previous(weekday);

The previous such weekday strictly before this moment, at the same time of day.

Parameters

Name Type Description
weekday string | number A name in any spelling, or the ISO number

Returns

A new DateTime.

Usage

const sunday = datetime('2026-09-06T14:30', 'UTC');


sunday.previous('friday').toString(); // '2026-09-04T14:30:00.000Z'
sunday.previous('sunday').toString(); // '2026-08-30T14:30:00.000Z'

Example

Comparing

Every comparison takes anything datetime() reads, read in this moment’s zone.

equals

datetime.equals(other);

The same instant, whatever zone each side reads it in.

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads

Returns

true or false.

Usage

const moment = datetime('2026-09-06T14:30Z', 'UTC');


moment.equals('2026-09-06T14:30:00Z'); // true
moment.equals(moment.in('Asia/Tokyo')); // true
moment.equals('2026-09-06T14:31Z'); // false

Example

isBefore

datetime.isBefore(other);

Whether this moment comes before another.

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads

Returns

true or false.

Usage

const moment = datetime('2026-09-06T14:30Z', 'UTC');


moment.isBefore('2026-09-07T00:00Z'); // true
moment.isBefore(new Date('2026-09-06T15:00:00Z')); // true
moment.isBefore('2026-09-07'); // true, a date reads as its midnight in this zone

Example

isAfter

datetime.isAfter(other);

Whether this moment comes after another.

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads

Returns

true or false.

Usage

const moment = datetime('2026-09-06T14:30Z', 'UTC');


moment.isAfter('2026-09-06T00:00Z'); // true
moment.isAfter(datetime('2027-01-01T00:00Z')); // false

Example

isSame

datetime.isSame(other);
datetime.isSame(other, unit);
datetime.isSame(other, 'week', firstDay);

Whether two moments share a unit, judged in this moment’s zone. Without a unit it is equals().

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads
unit string 'year', 'quarter', 'month', 'week', 'day', 'hour', 'minute', 'second'
firstDay string | number The weekday a week starts on, for 'week'

Returns

true or false.

Usage

const moment = datetime('2026-09-06T14:30Z', 'UTC');


moment.isSame('2026-09-06T23:00Z', 'day'); // true
moment.in('Asia/Tokyo').isSame('2026-09-06T23:00Z', 'day'); // false, already tomorrow in Tokyo
moment.isSame('2026-09-01T00:00Z', 'week'); // true
moment.isSame('2026-09-01T00:00Z', 'week', 'sunday'); // false

Example

isPast

datetime.isPast();

Whether this moment is before now.

Returns

true or false.

Usage

now().minus(days(1)).isPast(); // true

Example

isFuture

datetime.isFuture();

Whether this moment is after now.

Returns

true or false.

Usage

now().plus(days(1)).isFuture(); // true

Example

isToday

datetime.isToday();

Whether this moment falls on today, in its zone.

Returns

true or false.

Usage

now().isToday(); // true
now().plus(days(1)).isToday(); // false

Example

isTomorrow

datetime.isTomorrow();

Whether this moment falls on tomorrow, in its zone.

Returns

true or false.

Usage

now().plus(days(1)).isTomorrow(); // true

Example

isYesterday

datetime.isYesterday();

Whether this moment falls on yesterday, in its zone.

Returns

true or false.

Usage

now().minus(days(1)).isYesterday(); // true

Example

isWeekend

datetime.isWeekend();

Whether this moment falls on a saturday or sunday, in its zone.

Returns

true or false.

Usage

datetime('2026-09-06T14:30', 'UTC').isWeekend(); // true


const evening = datetime('2026-09-06T23:00', 'America/New_York');
evening.isWeekend(); // true
evening.in('Asia/Tokyo').isWeekend(); // false, already monday in Tokyo

Example

isWeekday

datetime.isWeekday();

Whether this moment falls on monday through friday, in its zone.

Returns

true or false.

Usage

datetime('2026-09-07T09:00', 'UTC').isWeekday(); // true
datetime('2026-09-12T09:00', 'UTC').isWeekday(); // false

Example

isLeapYear

datetime.isLeapYear();

Whether this moment falls in a leap year.

Returns

true or false.

Usage

datetime('2028-02-01T00:00', 'UTC').isLeapYear(); // true
datetime('2026-02-01T00:00', 'UTC').isLeapYear(); // false

Example

Measuring

until

datetime.until(other);
datetime.until(other, unit);

The duration from this moment to another, balanced from years down, or the whole length as a number in one unit. The duration remembers this moment, so its months and years total. See Durations.

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads
unit string A unit to total in, 'hours', 'days', 'months'

Returns

A Duration, or a number with a unit. Negative when other comes first.

Usage

const start = datetime('2026-01-01T00:00Z', 'UTC');
const end = datetime('2026-04-05T06:07Z', 'UTC');


start.until(end).toString(); // 'P3M4DT6H7M'
start.until(end).format(); // '3 months, 4 days, 6 hours, 7 minutes'
start.until(end, 'hours'); // 2262.116666666667
end.until(start).toString(); // '-P3M4DT6H7M'

Example

since

datetime.since(other);
datetime.since(other, unit);

The duration from another moment to this one, other.until(this).

Parameters

Name Type Description
other DateTime | string | Date | number Anything datetime() reads
unit string A unit to total in

Returns

A Duration, or a number with a unit.

Usage

const end = datetime('2026-04-05T06:07Z', 'UTC');


end.since('2026-01-01T00:00Z').toString(); // 'P3M4DT6H7M'
end.since('2026-01-01T00:00Z', 'days'); // 94.25486111111111

Example

Ranges

to

datetime.to(end);
datetime.to(duration);
datetime.to(count, unit);

A range from this moment until another, or covering a length, the end excluded. See Range Bounds.

Parameters

Name Type Description
end DateTime | string | Date | number | Duration | object Another moment, read in this zone, or a length as a duration, fields or phrase
count number A count with a unit
unit string The unit for a count

Returns

A DateTimeRange.

Usage

const start = datetime('2026-09-06T09:00', 'UTC');


start.to('2026-09-06T17:00').toString(); // '2026-09-06T09:00:00.000Z/2026-09-06T17:00:00.000Z'
start.to(hours(8)).toString(); // '2026-09-06T09:00:00.000Z/2026-09-06T17:00:00.000Z'
start.to(90, 'minutes').toString(); // '2026-09-06T09:00:00.000Z/2026-09-06T10:30:00.000Z'
start.to(hours(8)).contains('2026-09-06T17:00Z'); // false

Example

range

datetime.range(unit);
datetime.range('week', firstDay);

The unit containing this moment as a half-open range, its start until the next start. The bounds a query for the day, week or month writes.

Parameters

Name Type Description
unit string 'year', 'quarter', 'month', 'week', 'day', 'hour'
firstDay string | number The weekday a week starts on, for 'week'

Returns

A DateTimeRange.

Usage

const moment = datetime('2026-09-06T14:30', 'UTC');


moment.range('day').toString(); // '2026-09-06T00:00:00.000Z/2026-09-07T00:00:00.000Z'
moment.range('month').toString(); // '2026-09-01T00:00:00.000Z/2026-10-01T00:00:00.000Z'
moment.range('day').contains('2026-09-07T00:00Z'); // false

Example

Formatting

format

datetime.format();
datetime.format(preset);
datetime.format(options);
datetime.format(tokens);
datetime.format(spec, locale);

Prints in the configured locale or one given. No argument is the locale’s medium date and short time.

Parameters

Name Type Description
spec string | object A preset, an Intl.DateTimeFormat options object, or a day.js token pattern
locale string A BCP 47 tag for this call, 'de', 'fr-FR'
Presets
Preset Prints
'short' 9/6/26, 2:30 PM
'medium' Sep 6, 2026, 2:30 PM, the default
'long' September 6, 2026 at 2:30 PM
'full' Sunday, September 6, 2026 at 2:30 PM
'date' Sep 6, 2026
'time' 2:30 PM
'month' September 2026
'text' Sep 6, 2026, 2:30 PM EDT, the form text holds
Tokens
Token Prints Token Prints
YYYY YY 2026 26 HH H 14 14
MMMM MMM MM M September Sep 09 9 hh h 02 2
DD D Do 06 6 6th mm m 30 30
dddd ddd dd Sunday Sun Su ss s SSS 00 0 000
Q W 3 36 A a PM pm
X x epoch seconds, epoch milliseconds Z ZZ +00:00 +0000
[text] passes through z zzzz UTC Coordinated Universal Time

The presets stand in for day.js’s L and LLL. An Intl options object may name its own timeZone.

Returns

A string.

Usage

const moment = datetime('2026-09-06T14:30', 'UTC');


moment.format(); // 'Sep 6, 2026, 2:30 PM'
moment.format('long'); // 'September 6, 2026 at 2:30 PM'
moment.format({ weekday: 'long', hour: 'numeric' }); // 'Sunday 2 PM'
moment.format({ timeStyle: 'short', timeZone: 'Asia/Tokyo' }); // '11:30 PM'
moment.format('dddd, MMMM Do YYYY [at] h:mm a'); // 'Sunday, September 6th 2026 at 2:30 pm'
moment.format('long', 'fr-FR'); // '6 septembre 2026 à 14:30'

Example

formatRelative

datetime.formatRelative();
datetime.formatRelative(to);
datetime.formatRelative(to, locale);

The distance in words, '3 hours ago', 'in 2 days', 'yesterday', measured against now unless another moment is given.

Parameters

Name Type Description
to DateTime | string | Date | number The moment to measure against, default now
locale string A BCP 47 tag for this call

Returns

A string.

Usage

const reference = datetime('2026-09-07T14:00Z', 'UTC');


datetime('2026-09-07T13:00Z').formatRelative(reference); // '1 hour ago'
datetime('2026-09-06T14:00Z').formatRelative(reference); // 'yesterday'
datetime('2026-09-09T14:00Z').formatRelative(reference); // 'in 2 days'
datetime('2026-09-09T14:00Z').formatRelative(reference, 'es'); // 'pasado mañana'

Example

Converting

toString

datetime.toString();

The instant in UTC, '2026-09-06T14:30:00.000Z', so two clients storing the same moment store the same bytes. Six or nine fraction digits print only when the value has them.

Returns

A string.

Usage

datetime('2026-09-06T10:30', 'America/New_York').toString(); // '2026-09-06T14:30:00.000Z'
datetime('2026-09-06T14:30:00.123456Z').toString(); // '2026-09-06T14:30:00.123456Z'
`Due ${datetime('2026-09-06T14:30Z')}`; // 'Due 2026-09-06T14:30:00.000Z'

Example

toJSON

datetime.toJSON();

The wire form, the same text as toString(), which datetime() reads back exactly. The zone does not travel. See Wire Forms.

Returns

A string.

Usage

const moment = datetime('2026-09-06T14:30', 'America/New_York');


JSON.stringify({ at: moment }); // '{"at":"2026-09-06T18:30:00.000Z"}'
datetime(JSON.parse(JSON.stringify({ at: moment })).at).equals(moment); // true

Example

toJSDate

datetime.toJSDate();

The same instant as a JavaScript Date.

Returns

A Date.

Usage

datetime('2026-09-06T14:30', 'UTC').toJSDate().toISOString(); // '2026-09-06T14:30:00.000Z'

Example

toTemporal

datetime.toTemporal();

The Temporal.ZonedDateTime underneath.

Returns

A Temporal.ZonedDateTime.

Usage

datetime('2026-09-06T14:30', 'Asia/Tokyo').toTemporal().toString(); // '2026-09-06T14:30:00+09:00[Asia/Tokyo]'

Example

valueOf

datetime.valueOf();

Epoch milliseconds, so datetimes sort with (a, b) => a - b and compare with <, while 'Due ' + dt gives the string, as Date decides it. A date, a time and a range refuse valueOf. See the rules.

Returns

A number.

Usage

const later = datetime('2026-09-06T14:35Z');
const earlier = datetime('2026-09-06T14:30Z');


later - earlier; // 300000
later > earlier; // true
[later, earlier].sort((a, b) => a - b)[0] === earlier; // true

Date Reads

What a Date caller reads, so code that never heard of Temporal keeps working on a DateTime. Date’s own conventions hold, getMonth() counts from 0, getDay() gives sunday as 0, getTimezoneOffset() is minutes west of UTC. The local family answers in the value’s zone, the UTC family in UTC.

Method Description
getTime Epoch milliseconds, the same number valueOf() gives
getFullYear, getMonth, getDate, getDay The date in the value’s zone, month from 0, sunday as 0
getHours, getMinutes, getSeconds, getMilliseconds The clock in the value’s zone
getTimezoneOffset Minutes west of UTC in the value’s zone, 240 for New York in September
getUTCFullYear, getUTCMonth, getUTCDate, getUTCDay, getUTCHours, getUTCMinutes, getUTCSeconds, getUTCMilliseconds The same instant read in UTC
toISOString Date’s millisecond form, '2026-09-06T18:30:15.250Z', where toString() keeps finer digits
toLocaleString, toLocaleDateString, toLocaleTimeString As Date prints them, in the value’s zone unless the options name one

Every setter a Date has refuses with immutable, since a DateTime never changes in place. set() and plus() give a new value.

Usage

const moment = datetime('2026-09-06T14:30:15.250', 'America/New_York');


moment.getTime(); // 1788719415250
moment.getMonth(); // 8
moment.getDay(); // 0
moment.getHours(); // 14
moment.getUTCHours(); // 18
moment.getTimezoneOffset(); // 240
moment.toISOString(); // '2026-09-06T18:30:15.250Z'
moment.toLocaleTimeString('en-US'); // '2:30:15 PM'
moment.setHours(9); // throws immutable

Example

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