September 2026 at a glance
September 2026 has 30 days. It starts on a Tuesday and ends on a Wednesday, with 22 weekdays and 8 weekend days (4 Saturdays and 4 Sundays). It covers ISO weeks 36 to 40, and days 244 to 273 of the year.
Week by week
Week 36 runs from Mon, Aug 31 to Sun, Sep 6; week 37 from Mon, Sep 7 to Sun, Sep 13; week 38 from Mon, Sep 14 to Sun, Sep 20; week 39 from Mon, Sep 21 to Sun, Sep 27; week 40 from Mon, Sep 28 to Sun, Oct 4. By the end of September, 273 days of 2026 have gone by (75%) and 92 remain. September is part of the third quarter (Q3), which has 64 working days in all.
Holidays in September 2026
- Monday, September 7: Labor Day
Counting Monday to Friday, September 2026 has 21 working days: 22 weekdays minus 1 federal holiday on a weekday. It brings a long weekend thanks to Labor Day (Monday, September 7).
Moon, seasons and clocks
Moon phases in Eastern Time: last quarter on Friday, September 4 at 3:51 AM, new moon on Thursday, September 10 at 11:27 PM, first quarter on Friday, September 18 at 4:44 PM and full moon on Saturday, September 26 at 12:49 PM. The full moon of September 26 is traditionally called the Harvest Moon. The September equinox falls on Tuesday, September 22 at 8:05 PM Eastern Time (00:05 UTC): fall begins in the Northern Hemisphere.
| Key date | Day |
|---|---|
| Last quarter | Fri, Sep 4 |
| Labor Day (federal holiday) | Mon, Sep 7 |
| New moon | Thu, Sep 10 |
| First quarter | Fri, Sep 18 |
| September equinox | Tue, Sep 22 |
| Full moon (Harvest Moon) | Sat, Sep 26 |
About September
September comes from septem, seven: it was the seventh month of the old Roman calendar, before January and February were added. It brings Labor Day on the first Monday, the back-to-school season and the September equinox, the start of astronomical fall.
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