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
92
Days Until
Monday, Monday, December 21, 2026
13w 1dWeeks + Days
13.14Exact Weeks
MonWeekday
2,208Total Hours
92 days until December 21
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How many days until…?
92
Days Until
Monday
Monday, December 21, 2026
13w 1dWeeks & Days
13Total Weeks
3 monthsApprox. Months
2,208Total Hours
From: September 20, 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.
Frequently Asked Questions
How many days until December 21?
There are 92 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 13 weeks and 1 days (or approximately 13.14 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.