There is in ISO 8601: https://en.wikipedia.org/wiki/Year_zero | Hacker News

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		ac29 on Aug 12, 2020 \| parent \| context \| favorite \| on: I accidentally built a nudity/porn platform There is in ISO 8601: https://en.wikipedia.org/wiki/Year_zero

unnouinceput on Aug 13, 2020 [–]

And how many calendars use it? Lemme give you a hint, it's the same number as the the year in question

Also there is no day 0 of the month, no month zero of the year. It's how calendars work.

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