December 2021 Calendar
December 2021 has 31 days, starting on a Wednesday and ending on a Friday. It spans ISO weeks 48–52, with 23 weekdays and 8 weekend days — and 10 public holidays across the 12 countries listed below.
December 2021 month grid
December 2021
| W | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 48 | 29 | 30 | 1 | 2 | 3 | 4 New Moon 07:44 UTC | 5 |
| 49 | 6 | 7 | 8 | 9 | 10 | 11 First Quarter 01:36 UTC | 12 |
| 50 | 13 | 14 | 15 | 16 Day of Reconciliation | 17 | 18 | 19 Full Moon 04:36 UTC |
| 51 | 20 | 21 December solstice | 22 | 23 | 24 Christmas Day (substitute day) | 25 Christmas Day | 26 Boxing Day · St. Stephen's Day · Day of Goodwill |
| 52 | 27 Christmas Day (substitute day) · Public Holiday · Last Quarter 02:24 UTC | 28 Boxing Day (substitute day) | 29 | 30 | 31 New Year's Day (substitute day) | 1 | 2 |
| 1 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
12 public holiday 🌑 🌓 🌕 🌗 moon phase (UTC date) solstice W = ISO week
Public holidays in December 2021
| Date | Holiday | Observed in |
|---|---|---|
| Day of Reconciliation | South Africa | |
| Christmas Day (substitute day) | US | |
| 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 | |
| Christmas Day (substitute day) | UK, Australia | |
| Public Holiday | South Africa | |
| Boxing Day (substitute day) | UK, Australia | |
| New Year's Day (substitute day) | US |
No national public holiday in December 2021 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
- New Moon
- First Quarter
- Full Moon
- Last 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 2021 at a glance
- Days
- 31
- Weekdays
- 23
- Weekend days
- 8
- ISO weeks
- 48–52
- Day of year
- 335–365 of 365
- Quarter
- Q4
- Days left in 2021 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 2021: common questions
How many working days are there in December 2021?
December 2021 has 23 weekdays (Monday to Friday) and 8 weekend days. In the United States, Christmas Day (substitute day) (Fri, Dec 24), Christmas Day (Sat, Dec 25) and New Year's Day (substitute day) (Fri, Dec 31) fall in the month, leaving 21 working days. In the United Kingdom, Christmas Day (Sat, Dec 25), Boxing Day (Sun, Dec 26), Christmas Day (substitute day) (Mon, Dec 27) and Boxing Day (substitute day) (Tue, Dec 28) leave 21 working days (UK-wide bank holidays only; England, Scotland and Northern Ireland each add their own).
What week numbers are in December 2021?
December 2021 covers ISO weeks 48, 49, 50, 51, 52. ISO weeks start on Monday, so December 1, a Wednesday, falls in week 48.
When is the full moon in December 2021?
Sunday, December 19 at 04:36 UTC. The new moon is on Saturday, December 4.
What day of the week does December 2021 start on?
December 2021 starts on a Wednesday and ends on a Friday (the 31st). It runs from day 335 to day 365 of the year.