def METHOD_NAME(self):
    checkdates = (
        date(2018, 2, 19),
        date(2019, 3, 11),
        date(2020, 3, 2),
        date(2021, 3, 15),
        date(2022, 3, 7),
        date(2023, 2, 27),
        date(2024, 3, 18),
    )
    for d in checkdates:
        self.assertIn(d, self.holidays)
        self.assertIn("Καθαρά Δευτέρα", self.holidays[d])