September 2027 at a glance
September 2027 has 30 days. It starts on a Wednesday and ends on a Thursday, with 22 weekdays and 8 weekend days (4 Saturdays and 4 Sundays). It covers ISO weeks 35 to 39, and days 244 to 273 of the year.
Week by week
Week 35 runs from Mon, Aug 30 to Sun, Sep 5; week 36 from Mon, Sep 6 to Sun, Sep 12; week 37 from Mon, Sep 13 to Sun, Sep 19; week 38 from Mon, Sep 20 to Sun, Sep 26; week 39 from Mon, Sep 27 to Sun, Oct 3. By the end of September, 273 days of 2027 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 2027
- Monday, September 6: Labor Day
Counting Monday to Friday, September 2027 has 21 working days: 22 weekdays minus 1 federal holiday on a weekday. It brings a long weekend thanks to Labor Day (Monday, September 6).
Moon, seasons and clocks
Moon phases in Eastern Time: first quarter on Tuesday, September 7 at 2:31 PM, full moon on Wednesday, September 15 at 7:04 PM, last quarter on Thursday, September 23 at 6:21 AM and new moon on Wednesday, September 29 at 10:36 PM. The full moon of September 15 is traditionally called the Harvest Moon. The September equinox falls on Thursday, September 23 at 2:01 AM Eastern Time (06:01 UTC): fall begins in the Northern Hemisphere.
| Key date | Day |
|---|---|
| Labor Day (federal holiday) | Mon, Sep 6 |
| First quarter | Tue, Sep 7 |
| Full moon (Harvest Moon) | Wed, Sep 15 |
| September equinox | Thu, Sep 23 |
| Last quarter | Thu, Sep 23 |
| New moon | Wed, Sep 29 |
About September
September is when the second half of the year gets serious. Labor Day, on the first Monday, is the last long weekend of summer, and the equinox around September 22 or 23 brings days and nights of almost equal length.
August 2027 · October 2027 · 2027 calendar · US holidays 2027 · week number today · moon calendar for September 2027