polars.Series.dt.day#

Series.dt.day() → Series[source]#

Extract the day from the underlying date representation.

Applies to Date and Datetime columns.

Returns the day of month starting from 1. The return value ranges from 1 to 31. (The last day of month differs by months.)

Returns:

Series: Series of data type Int8.

Examples

>>> from datetime import date
>>> s = pl.date_range(
...     date(2001, 1, 1), date(2001, 1, 9), interval="2d", eager=True
... ).alias("date")
>>> s.dt.day()
shape: (5,)
Series: 'date' [i8]
[
        1
        3
        5
        7
        9
]