If you ever fought, this is a handy reference.
Here’s a DEV write-up on a free world time API that works without accounts or keys, and it’s CORS-enabled.
Nice bits:
- Offsets + dst flag included
- IP-based https://cormacgyzp835474.educationalimpactblog.com/60954539/free-world-time-api-no-api-keys-for-frontend