Weeks Until December 21
View the weekly breakdown and decimal weeks until December 21.
CalculateWinter Date Countdown
How Many Days Until December 21?
Target Date: Monday, December 21, 2026
46
Days Until
Monday, Monday, December 21, 2026
6w 4dWeeks + Days
6.57Exact Weeks
MonWeekday
1,104Total Hours
46 days until December 21
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How many days until…?
46
Days Until
Monday
Monday, December 21, 2026
6w 4dWeeks & Days
6Total Weeks
1 monthsApprox. Months
1,104Total Hours
From: November 5, 2026To: Monday, December 21, 2026
What Day of the Week is December 21? (2024–2035)
Because a normal calendar year has 365 days (52 weeks plus 1 day), December 21 moves forward by one day of the week in common years, and by two days in leap years. Here is the day of the week for December 21 over the next 12 years:
| Year | Day of the Week | Weekend / Weekday | Leap Year? |
|---|---|---|---|
| 2024 | Saturday | Weekend | Yes (366 days) |
| 2025 | Sunday | Weekend | No (365 days) |
| 2026Upcoming | Monday | Weekday | No (365 days) |
| 2027 | Tuesday | Weekday | No (365 days) |
| 2028 | Thursday | Weekday | Yes (366 days) |
| 2029 | Friday | Weekday | No (365 days) |
| 2030 | Saturday | Weekend | No (365 days) |
| 2031 | Sunday | Weekend | No (365 days) |
| 2032 | Tuesday | Weekday | Yes (366 days) |
| 2033 | Wednesday | Weekday | No (365 days) |
| 2034 | Thursday | Weekday | No (365 days) |
| 2035 | Friday | Weekday | No (365 days) |
Calendar Facts About December 21
Day of the Year
Day 355
97% of the calendar year has passed by this date.
Days Left in Year
10 Days
Remaining until January 1 New Year.
Astrological Sign
♐ Sagittarius
Birthstone for December: Tanzanite & Turquoise.
Annual Calendar Elapsed Progress97% of Year
By December 21, 355 of 365 calendar days have concluded (10 days remaining until January 1).
All December Date Countdowns
December Day-of-Week Table →Frequently Asked Questions
How many days until December 21?
There are 46 calendar days until December 21 (Monday, December 21, 2026).
What day of the week is December 21, 2026?
In 2026, December 21 falls on a Monday.
How many weeks until December 21?
There are 6 weeks and 4 days (or approximately 6.57 weeks) until December 21.
What zodiac sign is December 21?
People born on December 21 fall under the astrological sign of Sagittarius (♐). The traditional birthstone for December is Tanzanite & Turquoise.
What day of the year is December 21?
December 21 is Day 355 of the year (97% of the year complete), with 10 days remaining until the new year.
What quarter and season does December 21 fall in?
In the calendar year, December 21 is in Quarter 4 (Q4) and falls in the meteorological season of Winter (❄️). It is notable as the Winter Solstice (Shortest daylight hours in the Northern Hemisphere).