Temporal.Now.timeZoneId()

Baseline Limited availability

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

The Temporal.Now.timeZoneId() static method returns a time zone identifier representing the system's current time zone. Most systems will return a primary time zone identifier such as "America/New_York", though offset time zone identifier such as "-04:00" is possible too. The time zone identifier returned is the default time zone used by the other Temporal.Now methods.

Syntax

Temporal.Now.timeZoneId()

Parameters

None.

Return value

A valid time zone identifier representing the system's current time zone. The returned time zone identifier is never a non-primary time zone identifier (alias). For example, it would always return "Asia/Kolkata" (new name) instead of "Asia/Calcutta" (old name). For more information, see time zones and offsets.

If the implementation does not support time zones, the method always returns "UTC".

Examples

Getting the system's current time zone

console.log(Temporal.Now.timeZoneId()); // e.g.: "America/New_York"

Specifications

Specification
Temporal # sec-temporal.now.timezoneid

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
`timeZoneId`	144	144	139	128	preview	144	139	95	No	No	144	No	1.4.0	2.7	26.0.0