type IsoWeekdayNumber = 1 | 2 | 3 | 4 | 5 | 6 | 7
Union type of all valid ISO weekday numbers (1 | 2 | 3 | 4 | 5 | 6 | 7).
Union type of all valid ISO weekday numbers (1 | 2 | 3 | 4 | 5 | 6 | 7).