If you ever fought, this is a handy reference.
Here’s a DEV write-up on a free world time API that needs no sign-ups or API keys, and it’s CORS-enabled.
Nice bits:
- Offsets + dst flag included
- IP-based https://lewiswzju398398.goabroadblog.com/38439729/free-world-time-api-no-api-keys-cors-ready