2025 Calendar Week Start Sunday Or Monday. The first calendar week in 2025 begins on monday, the 30/12/2024 and. The year which begins with advent 2024 and ends at advent 2025 is year c.
The year 2025 has 52 calendar weeks. The first calendar week of 2025 starts on monday, december 30, 2024 and ends on sunday, january 5, 2025.