Ask HN: How calendars are implemented in different programming language?

[ponsfrilus]

Counting the number of seconds between 1970-01-01 and 0000-00-00 will differ from a language to another. Is there eli5 or relevant post about it?

[danuker]

There are leap seconds and days which various languages may or may not account for.

[trinovantes]

Always a classic watch https://www.youtube.com/watch?v=-5wpm-gesOY

[ponsfrilus]

Yes! This Computerphile's video is a must watch!