On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 144 on 2026-01-13
In Chrome Android version 144 on 2026-01-13
In Deno version 1.40 on 2024-01-25
In Edge version 144 on 2026-01-15
In Firefox version 139 on 2025-05-27 Note: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.
In Firefox for Android version 139 on 2025-05-27 Note: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.
Not in Internet Explorer
Not in Node.js
Not in Quest Browser
Not in Opera
Not in Opera Android
Not in Safari
Not in Safari on iOS
Not in Samsung Internet
In WebView Android version 144 on 2026-01-13
Not in WebView on iOS