| 2024 | September 30 – October 6, 2024 |
| 2025 | September 29 – October 5, 2025 |
| 2026 | September 28 – October 4, 2026 |
| 2027 | October 4 – October 10, 2027 |
| 2028 | October 2 – October 8, 2028 |
| 2029 | October 1 – October 7, 2029 |
| 2030 | September 30 – October 6, 2030 |
| 2031 | September 29 – October 5, 2031 |
| 2032 | September 27 – October 3, 2032 |
Week 40 of 2026 runs from Monday, September 28, 2026 to Sunday, October 4, 2026.
Week 40 of 2026 starts in 68 days, on Monday, September 28, 2026.
It is currently week 30 of 53 in 2026 (today is Wednesday, July 22, 2026).
These are ISO 8601 week numbers (weeks start Monday; week 1 holds the year's first Thursday), the standard in Europe and in Excel's ISOWEEKNUM. The US convention (Excel's WEEKNUM) starts week 1 on January 1 with weeks starting Sunday, so its numbers can be one higher.