October 4 – October 10, 2027 · 2027-W40 · ~76% through 2027
Week Details
| Week number | 40 |
| Year | 2027 |
| ISO notation | 2027-W40 |
| Start date | Monday, October 4, 2027 |
| End date | Sunday, October 10, 2027 |
| Working days | 5 (Mon–Fri) |
| Year progress | 76% |
Days in This Week
Mon Today
Oct 4 Tue Today
Oct 5 Wed Today
Oct 6 Thu Today
Oct 7 Fri Today
Oct 8 Sat Today
Oct 9 Sun Today
Oct 10 All Weeks of 2027
Week 40 in Other Years
| Year | Start | End |
|---|---|---|
| 2026 | Sep 28, 2026 | Oct 4, 2026 |
Frequently Asked Questions
What dates are in week 40 of 2027?
Week 40 of 2027 starts on Monday, October 4, 2027 and ends on Sunday, October 10, 2027. It contains 5 working days (Monday–Friday) and a 2-day weekend (Saturday–Sunday).
What is the ISO notation for week 40, 2027?
The ISO 8601 week date notation is 2027-W40. Individual days are written as 2027-W40-1 (Monday) through 2027-W40-7 (Sunday).
How far through 2027 is week 40?
Week 40 begins around day 277 of 365, which is approximately 76% through the year.