pandas.Series.dt.month

Series.dt.month[source]

The month as January=1, December=12.

Examples

>>> datetime_series = pd.Series(
...     pd.date_range("2000-01-01", periods=3, freq="ME")
... )
>>> datetime_series
0   2000-01-31
1   2000-02-29
2   2000-03-31
dtype: datetime64[ns]
>>> datetime_series.dt.month
0    1
1    2
2    3
dtype: int32

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