polars.Series.dt.ordinal_day#

Series.dt.ordinal_day() → Series[source]#

Extract ordinal day from underlying date representation.

Applies to Date and Datetime columns.

Returns the day of year starting from 1. The return value ranges from 1 to 366. (The last day of year differs by years.)

Returns:

Series: Series of data type Int16.

Examples

>>> from datetime import date
>>> s = pl.date_range(
...     date(2001, 1, 1), date(2001, 3, 1), interval="1mo", eager=True
... ).alias("date")
>>> s.dt.ordinal_day()
shape: (3,)
Series: 'date' [i16]
[
        1
        32
        60
]