# Time zones: It's not just «use UTC, man»

- Published: 2023-08-16
- URL: https://notes.webutvikling.org/dont-build-a-calendar
- Tags: timezone, utc, calendar
- Source: https://zachholman.com/talk/utc-is-enough-for-everyone-right

«Hi. This is my first time at Developers Anonymous. My name is Tomas, I'm a coder and I've built a calendar»...  Time zones are f***ing hard. The last 6 months I've reported and fixed bugs in Moment, dayjs, date-fns-tz and React Aria.

If you tell me «Just use UTC», I will punch you in the face.
The amount of bugs regarding time zone conversion is staggering.