def METHOD_NAME(self):
    """
    Ethiopian leap years are coincident with leap years in the Gregorian
    calendar until the end of February 2100. It starts earlier from new
    year of western calendar.
    Ethiopian leap year starts on Sep 11, so it has an effect on
    holidays between Sep 11 and Jan 1. Therefore, here on the following
    function we intentionally add 1 to the leap year to offset the
    difference.
    """
    return isleap(self._year + 1)