Temporal.ZonedDateTime.prototype.toPlainTime()

Limited availability

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

The toPlainTime() method of Temporal.ZonedDateTime instances returns a new Temporal.PlainTime object representing the time portion of this date-time.

Warning: After a Temporal.ZonedDateTime is converted to Temporal.PlainTime, it's no longer time-zone-aware. Subsequent operations like arithmetic or with() operations will not adjust for DST and may not yield the same results as equivalent operations with the original Temporal.ZonedDateTime. However, unless you perform those operations across a time zone offset transition, it's impossible to notice the difference. Therefore, be very careful when performing this conversion because subsequent results may be correct most of the time, but only turn out incorrect when moving across offset transitions like when DST starts or ends.

Syntax

js
toPlainTime()

Parameters

None.

Return value

A new Temporal.PlainTime object representing the time portion of this date-time.

Examples

Using toPlainTime()

js
const zdt = Temporal.ZonedDateTime.from(
  "2021-07-01T12:34:56.987654321-04:00[America/New_York]",
);
const plainTime = zdt.toPlainTime();
console.log(plainTime.toString()); // 12:34:56.987654321

Specifications

Specification
Temporal
# sec-temporal.zoneddatetime.prototype.toplaintime

Browser compatibility

desktop mobile server
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Bun
Deno
Node.js
toPlainTime
Chrome – Full support
Chrome 144 (Release date: 2026-01-13)
footnote Full support
Edge – Full support
Edge 144 (Release date: 2026-01-21)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote Full support
Opera – Full support
Opera 128 (Release date: 2026-02-26)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 223166
Chrome Android – Full support
Chrome Android 144 (Release date: 2026-01-13)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote Full support
Opera Android – Full support
Opera Android 95 (Release date: 2026-02-11)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 223166
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 144 (Release date: 2026-01-13)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 223166
Bun – No support
Bun
footnote No support
Deno – Full support
Deno 2.7 (Release date: 2026-02-25)
footnote Full support
Node.js – No support
Node.js
footnote No support

Legend

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

Full support
Full support
No support
No support
See implementation notes.

See also