December 2025 starts on a Sunday and has 31 days.
– 2025 December Calendar Printable (US)
Federal Holidays December 2025 US
– December 25, 2025 (Thursday): Christmas Day
Week Overview
– Week 1: December 1 – December 7 (Sunday – Saturday)
– Week 2: December 8 – December 14 (Sunday – Saturday)
– Week 3: December 15 – December 21 (Sunday – Saturday)
– Week 4: December 22 – December 28 (Sunday – Saturday)
– Week 5: December 29 – December 31 (Sunday – Tuesday)
This month has four full weeks and one partial week at the end.