JavaScript Temporal Now zonedDateTimeISO()
Description
The zonedDateTimeISO() method returns a ZonedDateTime object
representing the current date and time in the specified time zone in the ISO 8601 calendar system.
Syntax
Temporal.Now.zonedDateTimeISO(zone)
Parameters
| Parameter | Description |
| zone | A string representing the time zone to use. |
Return Value
| Type | Description |
| Object | A ZonedDateTime object representing the current date and time in the specified time zone. |
Browser Support
Temporal is a major update to the JavaScript standard (TC39).
It is currently supported in Chrome, Edge, Firefox, and Opera and is expected to reach full availability across browsers before the summer of 2026.
| Chrome 144 |
Edge 144 |
Firefox 139 |
Safari |
Opera 128 |
| Jan 2026 | Jan 2026 | May 2025 | 🚫 | Feb 2026 |
The Safari implementation can be tested in Safari Technology Preview by enabling the --use-temporal runtime flag.
Polyfill
Until Safari support Temporal natively, you can use the official polyfill:
<script
src="https://cdn.jsdelivr.net/npm/@js-temporal/polyfill/dist/index.umd.js">
</script>