December 2025 Calendar
December 2025 has 31 days, starting on a Monday and ending on a Wednesday. It spans ISO weeks 49–1, with 23 weekdays and 8 weekend days — and 5 public holidays across the 12 countries listed below.
December 2025 month grid
December 2025
| W | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 49 | 1 | 2 | 3 | 4 Full Moon 23:14 UTC | 5 | 6 | 7 |
| 50 | 8 | 9 | 10 | 11 Last Quarter 20:52 UTC | 12 | 13 | 14 |
| 51 | 15 | 16 Day of Reconciliation | 17 | 18 | 19 | 20 New Moon 01:44 UTC | 21 December solstice |
| 52 | 22 | 23 | 24 | 25 Christmas Day | 26 Boxing Day · St. Stephen's Day · Day of Goodwill | 27 First Quarter 19:10 UTC | 28 |
| 1 | 29 | 30 | 31 | 1 | 2 | 3 | 4 |
| 2 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
12 public holiday 🌑 🌓 🌕 🌗 moon phase (UTC date) solstice W = ISO week
Public holidays in December 2025
| Date | Holiday | Observed in |
|---|---|---|
| Day of Reconciliation | South Africa | |
| Christmas Day | US, UK, Canada, Australia, Ireland, India, Germany, France, Brazil, Mexico, South Africa | |
| Boxing Day | UK, Canada, Australia, Germany | |
| St. Stephen's Day | Ireland | |
| Day of Goodwill | South Africa |
No national public holiday in December 2025 for the selected country.
National holidays only, from the open-source date-holidays dataset. States, provinces and regions add their own — see each country's holiday page for the full list and observances.
Moon phases
- Full Moon
- Last Quarter
- New Moon
- First Quarter
December solstice:
Times are shown in your time zone when JavaScript is on, UTC otherwise; near midnight the local date can differ. For moonrise and moonset see the moon pages for New York, London or Sydney.
December 2025 at a glance
- Days
- 31
- Weekdays
- 23
- Weekend days
- 8
- ISO weeks
- 49–1
- Day of year
- 335–365 of 365
- Quarter
- Q4
- Days left in 2025 after the 31st
- 0
- Friday the 13th
- No
The name: From the Latin decem, "ten": it was the tenth month of the early Roman calendar.
Working days by country
Monday–Friday minus national public holidays that fall on a weekday. Regional holidays are not subtracted.
Need a span that crosses months? Use the date and time calculator.
December 2025: common questions
How many working days are there in December 2025?
December 2025 has 23 weekdays (Monday to Friday) and 8 weekend days. In the United States, Christmas Day (Thu, Dec 25) falls in the month, leaving 22 working days. In the United Kingdom, Christmas Day (Thu, Dec 25) and Boxing Day (Fri, Dec 26) leave 21 working days (UK-wide bank holidays only; England, Scotland and Northern Ireland each add their own).
What week numbers are in December 2025?
December 2025 covers ISO weeks 49, 50, 51, 52, 1. ISO weeks start on Monday, so December 1, a Monday, falls in week 49.
When is the full moon in December 2025?
Thursday, December 4 at 23:14 UTC. The new moon is on Saturday, December 20.
What day of the week does December 2025 start on?
December 2025 starts on a Monday and ends on a Wednesday (the 31st). It runs from day 335 to day 365 of the year.