Temporal.ZonedDateTime.prototype.offset

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The offset accessor property of Temporal.ZonedDateTime instances returns a string representing the offset used to interpret the internal instant, in the form ±HH:mm (or ±HH:mm:ss.sssssssss with as much subminute precision as necessary). This offset is guaranteed to be valid for the given instant and time zone at construction time.

The set accessor of offset is undefined. You cannot change this property directly. Use the with() method to create a new Temporal.ZonedDateTime object with the desired new value (usually also changing the date/time), or use the withTimeZone() method to create a new Temporal.ZonedDateTime object in another time zone.

Examples

Using offset

js
const dt = Temporal.ZonedDateTime.from(
  "2021-07-01T12:00:00-07:00[America/Los_Angeles]",
);
console.log(dt.offset); // "-07:00"

const dt2 = Temporal.ZonedDateTime.from("2021-07-01T12:00:00-07[-07]");
console.log(dt2.offset); // "-07:00"

const dt3 = Temporal.ZonedDateTime.from(
  "1900-01-01T00:00:00+00:09:21[Europe/Paris]",
);
console.log(dt3.offset); // "+00:09:21"

const dt4 = Temporal.ZonedDateTime.from("2021-07-01T12:00:00Z[Asia/Shanghai]");
console.log(dt4.offset); // "+08:00"

Changing offset

If the local time happens to have two valid offsets, such as within a DST transition, you can change the offset without changing anything else:

js
const zdt = Temporal.ZonedDateTime.from(
  "2024-11-03T01:05:00-04:00[America/New_York]",
);
const newZDT = zdt.with({ offset: "-05:00" });
console.log(newZDT.toString()); // "2024-11-03T01:05:00-05:00[America/New_York]"

Specifications

Specification
Temporal proposal
# sec-get-temporal.zoneddatetime.prototype.offset

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
offset
Experimental

Legend

Tip: you can click/tap on a cell for more information.

No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.
User must explicitly enable this feature.

See also