Timezone 'CST' is unsupported in Firefox browser

[ilia-butovskii]

Describe the bug Timezone 'CST' is unsupported in Firefox browser, but it works in Safari, Chrome and Node

To Reproduce In Firefox

DateTime.local().setZone('CST').toISODate()

or

DateTime.fromISO('2024-02-09',  { zone: 'CST' }).toISODate()

Actual Throws error Error: Invalid DateTime: unsupported zone: the zone "CST" is not supported

Expected Set UTC−06:00 timezone

Desktop (please complete the following information):

• OS: MacOS, Windows
• Browser: Firefox 121, Firefox 122
• Luxon version 3.3.0
• Your timezone: GMT+7

[diesieben07]

new Intl.DateTimeFormat('de', {timeZone: 'CST'}).format() throws the same exception. You will have to speak to the Firefox developers about this.