How long until December 15?
It is 100 days, 3 hours, 40 minutes, 52 seconds until December 15, 2026.
Countdown to Any Calendar Date
Select any month and day or jump to major cultural and astronomical milestones.
Temporal Context & Calendar Metrics for December 15
Excludes 29 weekend days (Saturdays & Sundays).
95.6% of annual orbital cycle.
Autumnal Equinox occurred September 22
Fire element (Nov 22 - Dec 21).
About December 15: Significance & History
Calendar Significance & Context
Bill of Rights Day (US) / International Tea Day (Historic)December 15 marks the 349th day of the year (350th in leap years) within the fourth quarter. Historically, key milestones on this date include the events of 1791 (The United States Bill of Rights is ratified following approval by the Virginia General Assembly) and 1890 (Hunkpapa Lakota leader Sitting Bull is killed by Indian agency police on the Standing Rock Indian Reservation). Notable figures born on this day include Nero (born 37) and Gustave Eiffel (born 1832). The date also observes Bill of Rights Day (US) / International Tea Day (Historic).
On This Day in History
- 1791
The United States Bill of Rights is ratified following approval by the Virginia General Assembly.
- 1890
Hunkpapa Lakota leader Sitting Bull is killed by Indian agency police on the Standing Rock Indian Reservation.
- 1961
Former Nazi official Adolf Eichmann is sentenced to death by an Israeli court in Jerusalem for war crimes.
Notable Birthdays
- Nerob. 37
Fifth Roman Emperor who ruled from 54 AD to 68 AD.
- Gustave Eiffelb. 1832
French civil engineer who designed the Eiffel Tower in Paris and the framework for the Statue of Liberty.
- Bhaichung Bhutiab. 1976
Pioneering Indian international footballer and former national team captain.
Explore Related Calendar Dates
Adjacent Calendar Days:
Day 15 Across All Months:
Frequently Asked Questions About December 15
How many weeks and weekend days are left until December 15?
There are 14 full weeks plus 2 days (29 total weekend Saturdays and Sundays) remaining until December 15.
What is the astrological Zodiac sign for December 15?
People born on December 15 fall under the Sagittarius Zodiac sign (♐), associated with the Fire element (Nov 22 - Dec 21).
Which astronomical season and quarter does December 15 belong to?
December 15 falls in the astronomical season of Autumn within Q4 of the calendar year. (Autumnal Equinox occurred September 22).
How many days are left in Q4 around December 15?
December 15 is situated in Q4. Each financial and calendar quarter spans approximately 90 to 92 days of diurnal tracking.