Checks if date is in this week (from sunday to sunday)

        :return: True iff date is in this week (from sunday to sunday)

def is_in_this_week(self):
        """Checks if date is in this week (from sunday to sunday)

        :return: True iff date is in this week (from sunday to sunday)
        """
        return self.is_date_in_between(
            Weekday.get_last(self.week_end, including_today=True),
            Weekday.get_next(self.week_end),
            include_end=False
        )