BUG: Fix dt64[non_nano] + some_offsets incorrectly rounding #62383
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jbrockmendel
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Oct 4, 2025
jbrockmendel
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Oct 4, 2025
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Hi @jbrockmendel I think i might be a bit lost here. Could you please guide me if i’m heading in the wrong direction? Thank you! |
pandas/core/arrays/datetimes.py
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| idx_self = units.index(self.unit) | ||
| idx_offset = units.index(offset_unit) | ||
| res_unit = units[min(idx_self, idx_offset)] | ||
| if isinstance(offset, Tick) or ( |
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what you had before here seemed much more reasonable. i dont see any reason for this to be specific to CustomBusinessDay
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thanks , then i will stick to previous changes there were many test failing , so i started from start.
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This PR updates logic selects the finest unit between the array and the offset, preventing rounding errors. A regression test is included to confirm correct behavior for affected offsets and units.
Please let me know if my approach or fix needs any improvements . I’m open to feedback and happy to make changes based on suggestions.
Thankyou !