How many business days are in September 2027?
September 2027 has 21 business days. The month runs 30 days from Wednesday, September 1 to Thursday, September 30, and contains 8 weekend days plus one federal holiday: Labor Day on Monday, September 6.
- Business days
- 21
- Calendar days
- 30
- Weekend days
- 8
- Holidays
- 1
Every business day in September 2027
All 21 working days, grouped by ISO week. Weekends and observed federal holidays are already removed.
Holidays removed from the count
- Labor Day — Monday, September 6, 2027
The observed date is the one excluded, because that is the day federal offices close. Full rules are on the methodology page.
Count from a different date
To add or subtract working days from a specific date rather than count a whole month, use the calculator below — it applies the same holiday rules.
Deadlines without the date math.
Add or subtract working days, or count the working days between two dates. Weekends and observed U.S. federal holidays are excluded. Everything runs in this browser tab.
10 business days after the start date. The start date itself is not counted; weekends and observed U.S. federal holidays are skipped.
Common questions
How many business days are in September 2027?
How many weekend days are in September 2027?
Which federal holidays fall in September 2027?
Does this count include the first and last day of September 2027?
Related
See September 2027 laid out as a grid on the September 2027 calendar, which you can print or download as a PDF. For the whole year, see business days in 2027, and for the span between two arbitrary dates use the days between dates calculator.