September 2027 Calendar with Holidays
September 2027 runs from Wednesday, September 1, 2027 to Thursday, September 30, 2027. Of its 22 weekdays, 21 are working days, because Labor Day falls on Monday, September 6, 2027.
One page with the holidays marked.
September 2027 calendar
September 2027
- Mon September 6: Labor Day
- Sat September 11: Patriot Day
- Sun September 12: Grandparents Day
- Thu September 23: Fall
Weeks start on Sunday. The narrow first column is the ISO week number of each row's Monday, and federal holidays are shaded.
September 2027 in numbers
Holidays in September 2027
| US federal holiday | Day off | Federal Reserve Banks | Stock market (NYSE) |
|---|---|---|---|
| Labor Day | Monday, September 6 | Closed | Closed |
Labor Day gives a long weekend from Saturday, September 4 to Monday, September 6, 2027.
Other days to know
| Day | Date |
|---|---|
| Patriot Day | Saturday, September 11 |
| Grandparents Day | Sunday, September 12 |
| Fall | Thursday, September 23 |
Working days and paydays
At eight hours a day, the 21 working days add up to 168 hours.
Biweekly paydays depend on the Friday your pay cycle started. If it began on Friday, January 1, 2027, you are paid on September 10 and 24, 2027. On the other cycle, a week later, payday is September 3 and 17, 2027. Semi-monthly pay on the 15th and the last day comes on Wednesday, September 15, 2027 and Thursday, September 30, 2027.
Week numbers in September 2027
| ISO week | Monday | Sunday |
|---|---|---|
| Week 35 | August 30, 2027 | September 5, 2027 |
| Week 36 | September 6, 2027 | September 12, 2027 |
| Week 37 | September 13, 2027 | September 19, 2027 |
| Week 38 | September 20, 2027 | September 26, 2027 |
| Week 39 | September 27, 2027 | October 3, 2027 |
September 2027 has days in 5 ISO weeks, from week 35 to week 39.
In Excel or Google Sheets, the formula =ISOWEEKNUM(DATE(2027,9,15)) gives week 37 for September 15. The US formula =WEEKNUM(DATE(2027,9,15)) gives week 38 for the same day, since it starts weeks on Sunday and counts from January 1.
Moon phases in September 2027
| Phase | Date | Time |
|---|---|---|
| First quarter | Tuesday, September 7 | 2:31 PM ET |
| Full moon (Harvest Moon) | Wednesday, September 15 | 7:04 PM ET |
| Last quarter | Thursday, September 23 | 6:21 AM ET |
| New moon | Wednesday, September 29 | 10:36 PM ET |
The full moon this month is the Harvest Moon. It is full at 7:04 PM Eastern time on Wednesday, September 15, 2027. Look for the darkest skies around the new moon on Wednesday, September 29, 2027. Every full moon of the year, with its name, is on the full moon calendar 2027.
Clocks and seasons
The September equinox on Thursday, September 23 starts astronomical autumn in the Northern Hemisphere.
September 2027 questions
How many working days are in September 2027?
21. September 2027 has 22 weekdays, and Labor Day on Monday, September 6, 2027 is a federal holiday. State holidays and company closures are not taken out.
How many paydays are in September 2027?
With biweekly pay on Fridays, you get two either way: September 10 and 24, 2027 on one cycle, or September 3 and 17, 2027 on the other. Semi-monthly pay always gives two.
Related pages
Cite this page
APA: ClockTotals. (2026, October 26). September 2027 Calendar with Holidays. https://clocktotals.com/calendar/2027/september/
MLA: “September 2027 Calendar with Holidays.” ClockTotals, 26 Oct. 2026, clocktotals.com/calendar/2027/september/.
Link (HTML): <a href="https://clocktotals.com/calendar/2027/september/">September 2027 Calendar with Holidays</a>