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Pull requests: pandas-dev/pandas
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API: date_range, timedelta_range infer unit from start/end/freq API - Consistency Internal Consistency of API/Behavior Datetime Datetime data dtype Timedelta Timedelta data type
API: timestamp resolution inference: default to microseconds when possible Datetime Datetime data dtype Non-Nano datetime64/timedelta64 with non-nanosecond resolution Stale Timestamp pd.Timestamp and associated methods
#62031 by jorisvandenbossche was closed Nov 27, 2025 • Draft updated Nov 27, 2025
BUG/API: cast to nanos before writing datetimes to JSON Bug Datetime Datetime data dtype IO JSON read_json, to_json, json_normalize
API: to_datetime strings default to microsecond Datetime Datetime data dtype Non-Nano datetime64/timedelta64 with non-nanosecond resolution Timestamp pd.Timestamp and associated methods
BUG: DatetimeIndex asof with string key Datetime Datetime data dtype Indexing Related to indexing on series/frames, not to indexes themselves
Warn on no-op rounding for datetimelike dtypes Datetime Datetime data dtype Warnings Warnings that appear or should be added to pandas
BUG: Do not ignore sort in concat for DatetimeIndex Datetime Datetime data dtype Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#62752 by rhshadrach was closed Oct 25, 2025 • Draft updated Oct 25, 2025
1 of 5 tasks
[READY] perf improvements for strftime Datetime Datetime data dtype Performance Memory or execution speed performance Stale
#51298 by smarie was closed Oct 5, 2025 Loading… updated Oct 5, 2025
5 tasks done
BUG: Timestamp.replace failing to update unit Datetime Datetime data dtype Non-Nano datetime64/timedelta64 with non-nanosecond resolution
BUG: to_datetime(None) inconsistent with other conversions Datetime Datetime data dtype Timedelta Timedelta data type
Bug cov nat Datetime Datetime data dtype Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
BUG: date comparison fails when series is all pd.NaT values Bug Datetime Datetime data dtype Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
BUG: Fix bug in to_datetime that occasionally throws FloatingPointErr… Datetime Datetime data dtype Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
BUG: Raise TypeError when subracting DateTimeArray and other date types Datetime Datetime data dtype Error Reporting Incorrect or improved errors from pandas Stale Timedelta Timedelta data type
REF: stricter typing, better naming in parsing.pyx Datetime Datetime data dtype Typing type annotations, mypy/pyright type checking
API (string): return str dtype for .dt methods, DatetimeIndex methods backported Datetime Datetime data dtype Strings String extension data type and string data
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