Week 39, 2025
ISO-8601 Standard Week
Week 39 of 2025 runs from September 29, 2025 to October 5, 2025, 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
September 29, 2025
Ends On
Sunday
October 05, 2025
This week marks approximately 75% of the year 2025 passed.
September 2025 Calendar
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 36 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 37 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 38 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 39 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 40 | 29 | 30 | 1 | 2 | 3 | 4 | 5 |
Holidays in Week 39
All Weeks in 2025
Week 39 in Other Years
Compare dates and holidays for week 39 across different years:
About Week 39
Week 39 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, September 29 to Friday, October 03) and a standard 2-day weekend.