[0.5.4] - 2026-06-23 - #10
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Fixed
split_by_date()no longer raisesOutOfBoundsDatetime("Cannot cast 0001-01-01 ... tounit='ns' without overflow") on
datetime64[ns]time columns. The internal ordinalconversion (
normalize_sequence_col) anchored on0001-01-01, which is outside thenanosecond-resolution range; subtracting it from an
nsseries forced a resolution alignmentthat overflowed. The origin is now the Unix epoch (
1970-01-01) plus its ordinal offset,yielding identical results without overflow. Surfaced with nanosecond datetimes
(e.g.
split_by_date(df, "2015-07-06", observation_days=6, gt_days=1)).