Return Victoria Day for Edinburgh.

        Set to the Monday strictly before May 24th. It means that if May 24th
        is a Monday, it's shifted to the week before.

def get_victoria_day(self, year):
        """
        Return Victoria Day for Edinburgh.

        Set to the Monday strictly before May 24th. It means that if May 24th
        is a Monday, it's shifted to the week before.
        """
        may_24th = date(year, 5, 24)
        # Since "MON(day) == 0", it's either the difference between MON and the
        # current weekday (starting at 0), or 7 days before the May 24th
        shift = may_24th.weekday() or 7
        victoria_day = may_24th - timedelta(days=shift)
        return (victoria_day, "Victoria Day")