This week is ISO week 39
The week runs from Monday 21 September 2026 to Sunday 27 September 2026. Today is Wednesday, 23 September 2026, day 3 of the seven. 5 dated items fall inside it.
What week of the year is it?
It is ISO week 39. The ISO 8601 rule puts Monday first and assigns a week to the year containing its Thursday, which is why the first week of January can begin in December and why some years run to 53 weeks. Today, Wednesday, 23 September 2026, is day 3 of this week and day 266 of the year.
What are the dates this week?
| Weekday | Date | Day of year | On that day |
|---|---|---|---|
| Monday | 21 September | 264 | International Day of Peace |
| Tuesday | 22 September | 265 | September equinox |
| Wednesday | 23 September (today) | 266 | International Day of Sign Languages, September equinox |
| Thursday | 24 September | 267 | nothing dated |
| Friday | 25 September | 268 | nothing dated |
| Saturday | 26 September | 269 | Full Moon |
| Sunday | 27 September | 270 | nothing dated |
What is on this week?
| Date | What it is | Kind | Days away |
|---|---|---|---|
| 21 September | International Day of Peace | observance | -2 days |
| 22 September | September equinox | astronomical | -1 days |
| 23 September | International Day of Sign Languages | observance | today |
| 23 September | September equinox | astronomical | today |
| 26 September | Full Moon | sky event | 3 days |
How much of the week is left?
4 days of this week remain after today. Of the seven days, 5 are Monday to Friday and 2 are weekend days. Counting only the part still ahead, 3 weekdays and 2 weekend days are left including today.
How many weeks are left in the year?
After this Sunday, 13 full weeks remain in 2026, covering 99 days in total. The whole week sits inside September 2026. The year is 72.9% complete.
What is on after this week?
| Date | What it is | Kind | Days away |
|---|---|---|---|
| 30 September | National Day for Truth and Reconciliation | holiday | 7 days |
| 30 September | US federal fiscal year ends | observance | 7 days |
| 1 October | October starts | observance | 8 days |
| 1 October | Q4 starts | observance | 8 days |
| 1 October | US federal fiscal year starts | observance | 8 days |
| 3 October | Last Quarter | sky event | 10 days |
Questions about this week
- What week of the year is it?
- ISO week 39 of 2026.
- What are the dates of this week?
- Monday 21 September 2026 to Sunday 27 September 2026.
- How many weeks are left this year?
- 13 full weeks after this Sunday.
- What is on this week?
- International Day of Peace, September equinox, International Day of Sign Languages, September equinox, Full Moon.
- Does the week start on Monday or Sunday?
- ISO 8601 starts the week on Monday, which is the convention used here. The North American convention starts it on Sunday and gives a different week number.