Method onOffset

xarray/coding/cftime_offsets.py:567–570

Check if the given date is in the set of possible dates created using a length-one version of this offset class.

(self, date)

    _default_month = 1

    def onOffset(self, date) -> bool:
        """Check if the given date is in the set of possible dates created
        using a length-one version of this offset class."""
        return date.day == 1 and date.month == self.month

    def rollforward(self, date):
        """Roll date forward to nearest start of year"""