Week 40, 2025
ISO-8601 Standard Week
Week 40 of 2025 runs from October 6, 2025 to October 12, 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
October 06, 2025
Ends On
Sunday
October 12, 2025
This week marks approximately 76% of the year 2025 passed.
October 2025 Calendar
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 40 | 29 | 30 | 1 | 2 | 3 | 4 | 5 |
| 41 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 42 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 43 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 44 | 27 | 28 | 29 | 30 | 31 | 1 | 2 |
Holidays in Week 40
All Weeks in 2025
Week 40 in Other Years
Compare dates and holidays for week 40 across different years:
About Week 40
Week 40 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, October 06 to Friday, October 10) and a standard 2-day weekend.