Working days in September 2027
September 2027 has 21 working days in the United States: 22 weekdays minus 1 federal holiday, Labor Day on Monday 6 September. At 8 hours a day that is 168 working hours. The month runs from Wednesday 1 September to Thursday 30 September: 30 days, 22 weekdays and 8 weekend days.
- Working days
- 21
- Working hours
- 168
- Weekdays
- 22
- Weekend days
- 8
- Federal holidays
- 1
- Calendar days
- 30
- First working day
- Wednesday 1 September
- Last working day
- Thursday 30 September
Calendar for September 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |
- Weekend
- Federal holiday
The month opens on a Wednesday, so Wednesday 1 September is also its first working day. It ends on a Thursday, so Thursday 30 September is the last working day as well. September 2027 has five Wednesdays and five Thursdays, and four of every other day: 4 Mondays to start a week on and 4 Fridays to finish one. It covers days 244 to 273 of the year and ISO weeks 35 to 39.
Working days in each week of September 2027
Weeks run Monday to Sunday and carry their ISO week number. Only the days inside September are counted, so a week the month shares with August or October shows just its share.
| Week | Dates | Working days | Note |
|---|---|---|---|
| Week 35 | 1 to 5 September | 3 | Part week, the month starts mid-week |
| Week 36 | 6 to 12 September | 4 | Labor Day |
| Week 37 | 13 to 19 September | 5 | Full week, no holiday |
| Week 38 | 20 to 26 September | 5 | Full week, no holiday |
| Week 39 | 27 to 30 September | 4 | Part week, the month ends mid-week |
How the working days in September 2027 are counted
One federal holiday falls in September 2027: Labor Day on Monday 6 September 2027. It takes one weekday out of the count, leaving 21 working days from 22 weekdays.
The rule is the same on every page here: count Monday to Friday, then take off any federal holiday that lands on one of those days. The holiday dates are the ones the US Office of Personnel Management publishes for federal pay and leave. State holidays, religious holidays and company closures are not included, and other countries have different lists entirely, so treat 21 as the federal baseline for September 2027 and adjust it for your own calendar.
September 2027 next to the months around it
September 2027 has 21 working days, one day fewer than August 2027 (22) and one day more than October 2027 (20). A 30-day month has 20, 21 or 22 weekdays depending on the day it starts on; a Wednesday start gives September 2027 22.
September is the third month of the third quarter. Q3 2027 has 64 working days in total: July 21, August 22 and September 21. That is 512 working hours for the quarter at 8 hours a day, out of 1,992 for the whole of 2027.
Count working days in September 2027 with your own holidays
Open the business days calculator with September 2027 filled in, with the federal holiday dates already in the holiday box. Add your state or company holidays, or take out the federal ones that your employer does not observe, and the count updates as you type. The calculator can also count from a date in the middle of the month, or find the date a set number of working days ahead, which is how most deadlines are written.
Questions people ask
How many working days are in September 2027?
21. September 2027 has 22 weekdays (Monday to Friday) and 1 federal holiday on a weekday, Labor Day on Monday 6 September, which leaves 21. Weekends, 8 days this month, are not working days.
How many working hours are in September 2027?
168 hours at 8 hours a day: 21 working days times 8. On a 7.5 hour day it is 157.5 hours, and a 40 hour week over 22 weekdays with no holidays would be 176 hours.
Is there a federal holiday in September 2027?
Yes, one: Labor Day on Monday 6 September 2027. It falls on a weekday, so it is taken off the count.
What are the first and last working days of September 2027?
The first working day is Wednesday 1 September 2027. The last working day is Thursday 30 September 2027.
How many weekends are in September 2027?
8 weekend days: 4 Saturdays and 4 Sundays. Eight is the fewest a month can have, so most of the month is working time.