Week 51, 2025
ISO-8601 Standard Week
Starts On
Monday
December 22, 2025
Ends On
Sunday
December 28, 2025
This week marks approximately 98% of the year 2025 passed.
December 2025 Calendar
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 49 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 50 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 51 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 52 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 1 | 29 | 30 | 31 | 1 | 2 | 3 | 4 |
Holidays in Week 51
All Weeks in 2025
Week 51 in Other Years
Compare dates and holidays for week 51 across different years:
About Week 51
Week 51 of 2025 is a standard business week consisting of 7 days. It follows the ISO-8601 convention where Monday is the first day of the week.
Working Days
In most countries, this week contains 5 working days (Monday, December 22 to Friday, December 26) and a standard 2-day weekend.