dt.
is_year_start
Indicate whether the date is the first day of a year.
The same type as the original data with boolean values. Series will have the same name and index.
See also
is_year_end
Similar property indicating the last day of the year.
Examples
This method is available on Series with datetime values under the .dt accessor.
.dt
>>> dates = ps.Series(pd.date_range("2017-12-30", periods=3)) >>> dates 0 2017-12-30 1 2017-12-31 2 2018-01-01 dtype: datetime64[ns]
>>> dates.dt.is_year_start 0 False 1 False 2 True dtype: bool