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Backport PR #46697 on branch 1.4.x (DOC: indicate that month_name and day_name also applies to Series) #46710

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Merged
merged 1 commit into from
Apr 9, 2022
Merged

Backport PR #46697 on branch 1.4.x (DOC: indicate that month_name and day_name also applies to Series) #46710

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38 changes: 32 additions & 6 deletions pandas/core/arrays/datetimes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1217,7 +1217,8 @@ def to_perioddelta(self, freq) -> TimedeltaArray:

def month_name(self, locale=None):
"""
Return the month names of the DateTimeIndex with specified locale.
Return the month names of the :class:`~pandas.Series` or
:class:`~pandas.DatetimeIndex` with specified locale.

Parameters
----------
Expand All @@ -1227,11 +1228,23 @@ def month_name(self, locale=None):

Returns
-------
Index
Index of month names.
Series or Index
Series or Index of month names.

Examples
--------
>>> s = pd.Series(pd.date_range(start='2018-01', freq='M', periods=3))
>>> s
0 2018-01-31
1 2018-02-28
2 2018-03-31
dtype: datetime64[ns]
>>> s.dt.month_name()
0 January
1 February
2 March
dtype: object

>>> idx = pd.date_range(start='2018-01', freq='M', periods=3)
>>> idx
DatetimeIndex(['2018-01-31', '2018-02-28', '2018-03-31'],
Expand All @@ -1247,7 +1260,8 @@ def month_name(self, locale=None):

def day_name(self, locale=None):
"""
Return the day names of the DateTimeIndex with specified locale.
Return the day names of the :class:`~pandas.Series` or
:class:`~pandas.DatetimeIndex` with specified locale.

Parameters
----------
Expand All @@ -1257,11 +1271,23 @@ def day_name(self, locale=None):

Returns
-------
Index
Index of day names.
Series or Index
Series or Index of day names.

Examples
--------
>>> s = pd.Series(pd.date_range(start='2018-01-01', freq='D', periods=3))
>>> s
0 2018-01-01
1 2018-01-02
2 2018-01-03
dtype: datetime64[ns]
>>> s.dt.day_name()
0 Monday
1 Tuesday
2 Wednesday
dtype: object

>>> idx = pd.date_range(start='2018-01-01', freq='D', periods=3)
>>> idx
DatetimeIndex(['2018-01-01', '2018-01-02', '2018-01-03'],
Expand Down