def is_holiday(self, day, extra_holidays=None):
day = cleaned_date(day)<EOL>if extra_holidays:<EOL><INDENT>extra_holidays = tuple(map(cleaned_date, extra_holidays))<EOL><DEDENT>if extra_holidays and day in extra_holidays:<EOL><INDENT>return True<EOL><DEDENT>return day in self.holidays_set(day.year)<EOL>
Return True if it's an holiday.
        In addition to the regular holidays, you can add exceptions.

        By providing ``extra_holidays``, you'll state that these dates **are**
        holidays, even if not in the regular calendar holidays (or weekends).