Week 52, 2025
ISO-8601 Standard Week
Week 52 of 2025 runs from December 29, 2025 to January 4, 2026, and 2025 has 52 weeks in total.
This week is already in the past. See the full 2025 calendar, or learn why some years have 53 weeks.
Starts On
Monday
December 29, 2025
Ends On
Sunday
January 04, 2026
This week marks approximately 99% 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 52
All Weeks in 2025
Week 52 in Other Years
Compare dates and holidays for week 52 across different years:
About Week 52
Week 52 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 29 to Friday, January 02) and a standard 2-day weekend.