Countdown
How many days until December 21?
55
days until December 21
The next December 21 is Monday, December 21, 2026
The short answer
December 21 is 55 days away — that's 7 weeks and 6 days, roughly 1.8 months, or 1,320 hours. The next December 21 falls on a Monday (Monday, December 21, 2026). The number above updates automatically at midnight in your time zone.
December 21, 2026 at a glance
| Day of the week | Monday |
|---|---|
| Day of the year | Day 355 of 365 |
| Share of the year passed | 97% |
| Days left in 2026 after it | 10 |
| Quarter | Q4 |
| Season (Northern Hemisphere) | Winter |
What's happening in December
December holds the winter solstice, Christmas Eve and Christmas, and closes out the year on New Year's Eve.
Other dates to know in December 2026: Christmas Eve (December 24), Christmas (December 25).
The 55 days until December 21, broken down
39
business days
16
weekend days
7
full weeks
6
extra days
That's 39 working days (Monday to Friday) and 16 weekend days — 8 Saturdays and 8 Sundays. Public holidays vary by country, so they aren't deducted.
On December 21 in history
- 1898Pierre and Marie Curie announce the discovery of radium
- 1937Disney's Snow White premieres as first full-length animated feature
- 1968Apollo 8 launches, first crewed mission to orbit the Moon
- 1988Pan Am Flight 103 bombed over Lockerbie, killing 270
Notable world events that happened on December 21 in earlier years.
Days around December 21
50
until December 16
51
until December 17
52
until December 18
53
until December 19
54
until December 20
56
until December 22
57
until December 23
58
until December 24
59
until December 25
60
until December 26
The 21st of other months
86
until January 21
117
until February 21
145
until March 21
176
until April 21
206
until May 21
237
until June 21
267
until July 21
298
until August 21
329
until September 21
359
until October 21
25
until November 21
Holidays near December 21
See every December countdown → · Count days between any two dates →