How many business days are in December 2027?
December 2027 has 21 business days. The month runs 31 days from Wednesday, December 1 to Friday, December 31, and contains 8 weekend days plus one federal holiday: Christmas Day on Saturday, December 25.
- Business days
- 21
- Calendar days
- 31
- Weekend days
- 8
- Holidays
- 1
Every business day in December 2027
All 21 working days, grouped by ISO week. Weekends and observed federal holidays are already removed.
Holidays removed from the count
- Christmas Day — Saturday, December 25, 2027, observed Friday, December 24, 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 December 2027?
How many weekend days are in December 2027?
Which federal holidays fall in December 2027?
Does this count include the first and last day of December 2027?
Related
See December 2027 laid out as a grid on the December 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.