There are 23 business days in December 2027. That is 23 weekdays minus 0 US federal holidays falling on a weekday in the month. December 2027 starts on a Wednesday and ends on a Friday. This page gives the exact count, the day-by-day calendar, and how the count is worked out.
Try the tool: Business Days Calculator — count the business days for any month or date range, with your own holidays added.
How many business days in December 2027?
| Count | Value |
|---|---|
| Total days in the month | 31 |
| Weekdays (Monday–Friday) | 23 |
| Weekend days (Saturday–Sunday) | 8 |
| US federal holidays on weekdays | 0 |
| Business days | 23 |
The federal holidays in December 2027 are Christmas Day (25 December). 0 of them fall on a weekday and are subtracted from the weekday count; the rest fall on a weekend and cost no business days. Business days are counted here as weekdays minus US federal holidays — if your employer observes different holidays, add them in the business days calculator, which lets you add your own holidays.
The distinction matters: "business days" and "working days" are often used interchangeably, but they are not the same. Working days are the weekdays — Monday to Friday — and there are 23 of them in December 2027. Business days are the working days minus the public holidays, and there are 23 of them. A deadline of "10 business days" and a deadline of "10 working days" can therefore differ by a day or two, and the difference is the holidays.
Day-by-day calendar — December 2027
| Date | Day of the week | Business day? |
|---|---|---|
| 1 December 2027 | Wednesday | Yes |
| 2 December 2027 | Thursday | Yes |
| 3 December 2027 | Friday | Yes |
| 4 December 2027 | Saturday | No — weekend |
| 5 December 2027 | Sunday | No — weekend |
| 6 December 2027 | Monday | Yes |
| 7 December 2027 | Tuesday | Yes |
| 8 December 2027 | Wednesday | Yes |
| 9 December 2027 | Thursday | Yes |
| 10 December 2027 | Friday | Yes |
| 11 December 2027 | Saturday | No — weekend |
| 12 December 2027 | Sunday | No — weekend |
| 13 December 2027 | Monday | Yes |
| 14 December 2027 | Tuesday | Yes |
| 15 December 2027 | Wednesday | Yes |
| 16 December 2027 | Thursday | Yes |
| 17 December 2027 | Friday | Yes |
| 18 December 2027 | Saturday | No — weekend |
| 19 December 2027 | Sunday | No — weekend |
| 20 December 2027 | Monday | Yes |
| 21 December 2027 | Tuesday | Yes |
| 22 December 2027 | Wednesday | Yes |
| 23 December 2027 | Thursday | Yes |
| 24 December 2027 | Friday | Yes |
| 25 December 2027 | Saturday | No — weekend |
| 26 December 2027 | Sunday | No — weekend |
| 27 December 2027 | Monday | Yes |
| 28 December 2027 | Tuesday | Yes |
| 29 December 2027 | Wednesday | Yes |
| 30 December 2027 | Thursday | Yes |
| 31 December 2027 | Friday | Yes |
Working weeks in December 2027
The working weeks of the month — Monday to Friday, with the business days in each week:
| Week starting | Days | Business days |
|---|---|---|
| 29 November 2027 | 1 December 2027 – 3 December 2027 | 3 |
| 6 December 2027 | 6 December 2027 – 10 December 2027 | 5 |
| 13 December 2027 | 13 December 2027 – 17 December 2027 | 5 |
| 20 December 2027 | 20 December 2027 – 24 December 2027 | 5 |
| 27 December 2027 | 27 December 2027 – 31 December 2027 | 5 |
How the count is worked out
Step one: count the days in the month — 31 for December 2027. Step two: count the weekends. December 2027 starts on a Wednesday, so the Saturdays and Sundays fall on the dates shown in the table — 8 weekend days in total, leaving 23 weekdays. Step three: subtract the public holidays that fall on weekdays. In December 2027 that is 0 days, leaving 23 business days. The days between dates calculator does the same calculation for any date range, and the date calculator works out what date it is a number of days from now.
December in other years in other years
The same month in the adjacent years, for comparison — the number changes because the calendar shifts by one day each year (two after a leap year), so the same month starts on a different weekday.
| Year | Total days | Weekdays | Weekends | Business days |
|---|---|---|---|---|
| 2026 | 31 | 23 | 8 | 22 |
| 2027 | 31 | 23 | 8 | 23 |
| 2028 | 31 | 21 | 10 | 20 |
December 2027 in the year
December is the 12th month of 2027 — the 4th quarter of the year (Q4). There are 334 days in the year before December begins, and 0 days left in the year after it ends. In the Northern Hemisphere it is winter; in the Southern Hemisphere the seasons are reversed. 2027 is not a leap year, with 365 days.
There are no federal holidays left in 2027 after December — the year ends with the holidays already behind it. The days between dates calculator counts the days to any date, and the holiday countdowns show the countdown to each holiday live.
Planning with December 2027
23 business days is 4 working weeks and 3 days. If you are planning a project, a deadline or a holiday, that is the capacity of the month: 23 days on which offices, banks and government departments are open. The weekends — 8 days — are the days off, and the federal holidays are the days to check before you promise a delivery date. For the same month next year, see business days in december 2028.
Frequently asked questions
How many business days are there in December 2027?
23 — 23 weekdays minus 0 federal holidays on weekdays.
How many weekdays are in December 2027?
23 weekdays and 8 weekend days, out of 31 days in total.
What day of the week does December 2027 start on?
December 2027 starts on a Wednesday and ends on a Friday.
How many business days are there in December 2028?
See business days in december 2028 for the exact count — it differs because the calendar shifts by a day each year.
How many hours are there in December 2027?
744 hours — 44640 minutes, or 2678400 seconds. That is the total for the whole month, including the nights and weekends; the working hours are 184 for a standard eight-hour day, or 184 if you count business days only.
How do you count business days?
Count the weekdays in the range and subtract the public holidays that fall on weekdays. The business days calculator does it for any range, with your own holidays added.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - US federal holiday rules (5 U.S.C. § 6103): the holidays subtracted in the business day count are the eleven federal holidays, on the dates set by law.
- TimeFlow's business days calculator and days between dates calculator — the live tools behind the counts on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.