Week 40 of 2026
Week 40 of 2026 runs from Monday, September 28, to Sunday, October 4. See every date, weekday count and adjacent ISO weeks.
ISO week 40September 28–October 4, 2026Monday through Sunday · 5 weekdays · 2 weekend days
Current week
Week 40 at a glance
ISO code2026-W40
Calendar spanSeptember and October
QuarterQ3–Q4 2026
Day of year271–277
Dates in week 40
| Day | Date | Type |
|---|---|---|
| Monday | Weekday | |
| Tuesday | Weekday | |
| Wednesday | Weekday | |
| Thursday | Weekday | |
| Friday | Weekday | |
| Saturday | Weekend | |
| Sunday | Weekend |
About week 40 of 2026
Week 40 of 2026 runs from September 28, 2026 through October 4, 2026. It covers September and October and contains five standard Monday-to-Friday weekdays.
Public holidays are country-specific and are not removed from this basic weekday count. Use the working-days calculator when holidays need to be excluded.