How many business days are in December?

Q: How many business days are in December?

23 business days. December 2026 runs from Tuesday, December 1, 2026 to Thursday, December 31, 2026: 31 days in all, 23 of them weekdays and 8 weekend days. One federal holiday falls inside it — Christmas (December 25, 2026) — so 22 working days are left once those are taken off. Both end days are counted, which is how a calendar counts a month rather than how a date difference counts one. Business days here are Monday to Friday; federal holidays are listed separately because private employers do not all take the same ones.

December 2026 has

23 business days

Counted from Thursday, September 10, 2026. The figures are for December 2026; the table below carries them forward.

Business days: 23
Federal holidays: 1
Working days: 22
Total days: 31

December 2026 runs from Tuesday, December 1, 2026 to Thursday, December 31, 2026: 31 days in all, 23 of them weekdays and 8 weekend days. One federal holiday falls inside it — Christmas (December 25, 2026) — so 22 working days are left once those are taken off. Both end days are counted, which is how a calendar counts a month rather than how a date difference counts one. Business days here are Monday to Friday; federal holidays are listed separately because private employers do not all take the same ones.

Count any other period

What do you want to do?

Start date

End date

Amount to add

Unit

Subtract instead of add

Try an example

Result

31 days

Days: 31
Weeks and days: 4 weeks, 3 days
Months and days: 0 months, 30 days
Business days (Mon–Fri): 23Weekdays only; public holidays are not excluded.
Weekend days: 8
Resulting date: —
Day of the week: Tuesday → Thursday

Assumptions

Dates are local calendar dates; times and time zones are ignored.
Business days are Monday–Friday with no holiday exclusions.
Adding months keeps the day of month, clamped to the target month's length.

Common deadlines from December 1, 2026

After	Date	Falls on a
7 days	December 8, 2026	Tuesday
14 days	December 15, 2026	Tuesday
21 days	December 22, 2026	Tuesday
30 days	December 31, 2026	Thursday
45 days	January 15, 2027	Friday
60 days	January 30, 2027	Saturday
90 days	March 1, 2027	Monday
120 days	March 31, 2027	Wednesday
180 days	May 30, 2027	Sunday
365 days	December 1, 2027	Wednesday

Calendar days counted from the start date, the day itself not counted. Deadlines written as 'within 90 days' are calendar days unless the contract or court rule says business days.

December in the next five years

Year	Days	Business days
December 2026	31 days	23 weekdays, 22 working
December 2027	31 days	23 weekdays, 21 working
December 2028	31 days	21 weekdays, 20 working
December 2029	31 days	21 weekdays, 20 working
December 2030	31 days	22 weekdays, 21 working

Related calculators

Put this calculator on your own site

A working date calculator, free for any site, with no ads and no sign-up. It counts from the reader’s own today, not from the day you paste it.

Paste this anywhere. It works on any site, carries no ads, never expires, and always shows the current version.

Credit linkColours

Business Days in December by CalculateItNow

The page's own title. The clearest description of what the link leads to.

<iframe src="https://www.calculateitnow.dev/embed/date-calculator?mode=between&amp;inclusive=1" title="Business Days in December" width="100%" height="900" style="border:1px solid #e4e1d9;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:14px/1.5 system-ui,sans-serif;margin:8px 0 0"><a href="https://www.calculateitnow.dev/business-days-in-december">Business Days in December</a> by CalculateItNow</p>
<script src="https://www.calculateitnow.dev/embed.js" async></script>

The credit line sits outside the widget on purpose, so it is a real link on your page rather than one buried in a frame. Please keep it — it is what pays for CalculateItNow staying free and ad-free. The script only resizes the widget to fit its contents; drop it and the widget still works.