Correct output of timezone ("z") for CET/CEST

[vandres]

Describe the bug
When I am formatting the timzone with "z", I'll get a GMT+2. The date I am using is 2022-05-22, 11:00am UTC

dayjs(raceDate).locale(locale).format('LT z') // Output "13:00 GMT+2"

Expected behavior
I would expect CET or CEST. If I am using the long format instead, it works as expected:

dayjs(raceDate).locale(locale).format('LT zzz') // Output "13:00 Central European Summer Time"

Information

• Day.js Version: 1.9.7
• OS: iOS
• Browser: Safari
• Time zone: GMT+02:00 CEST

[iamkun]

This relies on the browser Intl result instead of Day.js.

[vandres]

@iamkun Thanks, I can see now.

[vandres]

@iamkun Maybe there is still an issues. See this code:

console.log(dayjs(raceDate).locale('de').format('LT z')); // Output "13:00 GMT+2"

console.log(new Intl.DateTimeFormat('de', {hour: '2-digit', minute: '2-digit', timeZoneName: 'short'}).format(new Date(Date.UTC(2021, 5, 8, 11, 0, 0)))); // Output "13:00 MESZ"

[audiojames]

I also came across this same issue, it is caused by setting the locale of Intl.DateTimeFormat to en-US. PR #1499 addresses this.

[koooge]

dupe? #1154