polars.Series.dt.iso_year

Series.dt.iso_year() → Series

Extract ISO year from underlying Date representation.

Applies to Date and Datetime columns.

Returns the year number according to the ISO standard. This may not correspond with the calendar year.

Returns:

ISO year as Int32

Examples

>>> from datetime import datetime
>>> dt = datetime(2022, 1, 1, 7, 8, 40)
>>> pl.Series([dt]).dt.iso_year()
shape: (1,)
Series: '' [i32]
[
        2021
]