Day.by_date(self.db_conn, '2024-01-01')
Day('2024-01-01').save(self.db_conn)
self.assertEqual(Day('2024-01-01'),
Day.by_date(self.db_conn, '2024-01-01'))
Day.by_date(self.db_conn, '2024-01-01')
Day('2024-01-01').save(self.db_conn)
self.assertEqual(Day('2024-01-01'),
Day.by_date(self.db_conn, '2024-01-01'))