PGN date tag input validation fails when entering date as 31st #17400
Description
https://lichess.org/forum/lichess-feedback/datumsformat-in-kapiteln-von-studien
I can add the date tag 2020.12.29, but not 2020.12.30.
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https://lichess.org/forum/lichess-feedback/datumsformat-in-kapiteln-von-studien
I can add the date tag 2020.12.29, but not 2020.12.30.