Week number
Week 45of 2026
Wednesday, November 4, 2026
- Week begins
- November 2, 2026
- Week ends
- November 8, 2026
- Sunday-start week
- 45 of 2026
- Sunday-start dates
- November 1, 2026 to November 7, 2026
ISO starts Monday; week one contains the first Thursday. Sunday-start uses the week containing January 1.
See the calendar and breakdown
November 2026
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
November 4, 2026
How this count works
ISO weeks start on Monday. Week one contains the year’s first Thursday. The Sunday-start comparison uses the week containing January 1 as week one.
A date near New Year can belong to a neighboring week-year. Sunday-start is a stated convention here; calendars used in the US do not all number weeks the same way.
A worked example
January 1, 2021 is in ISO week 53 of 2020. The Sunday-start comparison puts it in week 1 of 2021.