The withTimeZone() method of Temporal.ZonedDateTime instances returns a new Temporal.ZonedDateTime object representing the same instant as this date-time but in the new time zone. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the date-time's timeZoneId property.

To replace the date-time component properties, use the with() method. To replace its calendar, use the withCalendar() method.

Syntax

withTimeZone(timeZone)

Parameters

timeZone

Either a string or a Temporal.ZonedDateTime instance representing the time zone to use. If a Temporal.ZonedDateTime instance, its time zone is used. If a string, it can be a named time zone identifier, an offset time zone identifier, or a date-time string containing a time zone identifier or an offset (see time zones and offsets for more information).

Return value

A new Temporal.ZonedDateTime object representing the same instant as this date-time but in the new time zone.

Exceptions

TypeError

Thrown if timeZone is not a string or a Temporal.ZonedDateTime instance.

RangeError

Thrown if the time zone name is invalid.

Examples

Using withTimeZone()

const meetingTime = Temporal.ZonedDateTime.from(
  "2021-08-01T12:00[America/New_York]",
);
const meetingTimeInParis = meetingTime.withTimeZone("Europe/Paris");
console.log(meetingTimeInParis.toString()); // 2021-08-01T18:00:00+02:00[Europe/Paris]

Replacing the time zone while keeping the same wall-clock time

In the rare case where you want to keep the wall-clock time the same but change the time zone (and result in a different instant), convert it to a Temporal.PlainDateTime first:

const meetingTime = Temporal.ZonedDateTime.from(
  "2021-08-01T12:00[America/New_York]",
);
const meetingTimeInParis = meetingTime
  .toPlainDateTime()
  .toZonedDateTime("Europe/Paris");
console.log(meetingTimeInParis.toString()); // 2021-08-01T12:00:00+02:00[Europe/Paris]

Specifications

Browser compatibility

See also

• Temporal.ZonedDateTime
• Temporal.ZonedDateTime.prototype.with()
• Temporal.ZonedDateTime.prototype.withCalendar()
• Temporal.ZonedDateTime.prototype.withPlainTime()
• Temporal.ZonedDateTime.from()
• Temporal.ZonedDateTime.prototype.timeZoneId