Pandas OutOfBoundsDatetime and Universiteit Leiden

A sync job crashed on pd.to_datetime() for one row. The foundationdate was 1575-01-29 — Universiteit Leiden.

Default pandas timestamps are datetime64[ns]. That type only covers roughly 1677–2262. Anything earlier raises OutOfBoundsDatetime.

Post-mortem: OutOfBoundsDatetime on foundation date 1575-01-29

Old universities make great edge cases.