If you ever fought, this is a handy reference.
Here’s a DEV write-up on a public world time API that needs no sign-ups or API keys, and it’s frontend-friendly via CORS.
What I liked:
- Offsets + dst flag https://antontkyc172557.theblogfairy.com/38494486/no-signup-timezone-api-no-api-keys-cors-ready