pandas.Series.dt.daysinmonth

Series.dt.daysinmonth[source]

The number of days in the month.

Examples

>>> s = pd.Series(["1/1/2020 10:00:00+00:00", "2/1/2020 11:00:00+00:00"])
>>> s = pd.to_datetime(s)
>>> s
0   2020-01-01 10:00:00+00:00
1   2020-02-01 11:00:00+00:00
dtype: datetime64[ns, UTC]
>>> s.dt.daysinmonth
0    31
1    29
dtype: int32

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https://pandas.pydata.org/pandas-docs/version/2.3.0/reference/api/pandas.Series.dt.daysinmonth.html