The subtract() method of Temporal.ZonedDateTime instances returns a new Temporal.ZonedDateTime object representing this date-time moved backward by a given duration (in a form convertible by Temporal.Duration.from()).

If you want to subtract two date-times and get a duration, use since() or until() instead.

Syntax

subtract(duration)
subtract(duration, options)

Parameters

duration

A string, an object, or a Temporal.Duration instance representing a duration to subtract from this date-time. It is converted to a Temporal.Duration object using the same algorithm as Temporal.Duration.from().

options Optional

An object containing the following property:

overflow Optional

A string specifying the behavior when a date component is out of range. Possible values are:

"constrain" (default)

The date component is clamped to the valid range.

"reject"

A RangeError is thrown if the date component is out of range.

Return value

A new Temporal.ZonedDateTime object representing the date-time specified by the original ZonedDateTime, minus the duration.

Exceptions

RangeError

Thrown if the result is not in the representable range, which is ±10⁸ days, or about ±273,972.6 years, from the Unix epoch.

Description

Subtracting a duration is equivalent to adding its negation, so all the same considerations apply.

Examples

Subtracting a duration

const start = Temporal.ZonedDateTime.from(
  "2021-01-01T12:34:56-05:00[America/New_York]",
);
const end = start.subtract({
  years: 1,
  months: 2,
  weeks: 3,
  days: 4,
  hours: 5,
  minutes: 6,
  seconds: 7,
  milliseconds: 8,
});
console.log(end.toString()); // 2019-10-07T07:28:48.992-04:00[America/New_York]

Specifications

Browser compatibility

See also

• Temporal.ZonedDateTime
• Temporal.Duration
• Temporal.ZonedDateTime.prototype.add()
• Temporal.ZonedDateTime.prototype.since()
• Temporal.ZonedDateTime.prototype.until()