What Day of the Week Is December 15?
December 15, 2026 falls on a Tuesday.
It is day 349 of 2026, and 16 days of the year come after it. The date sits in ISO week 51 and in the fourth quarter, October to December. North of the equator it is day 85 of fall, and winter starts on December 21. In Australia and the rest of the south, it is spring. The Moon is a waxing crescent that day, and the next full moon is on Wednesday, December 23, 2026. It is not a US federal holiday.
December 15 from 2025 to 2028
The same date in four years, side by side. Moon phases use US Eastern dates.
| Fact | 2025 | 2026 | 2027 | 2028 |
|---|---|---|---|---|
| Day of the week | Monday | Tuesday | Wednesday | Friday |
| Day of the year | 349 of 365 | 349 of 365 | 349 of 365 | 350 of 366 |
| Days left in the year | 16 | 16 | 16 | 16 |
| ISO week | 51 | 51 | 50 | 50 |
| Quarter | Q4 | Q4 | Q4 | Q4 |
| Season (north) | Day 85 of fall | Day 85 of fall | Day 84 of fall | Day 85 of fall |
| Moon (US Eastern) | Waning crescent | Waxing crescent | Waning gibbous | New moon |
| US federal holiday | No | No | No | No |
| Other holidays | Hanukkah | – | – | – |
Holidays on December 15
None of the 245 holidays and observances on this site is fixed to December 15.
Holidays that move with the calendar land on December 15 in some years from 2026 to 2035.
| Holiday or observance | Years on December 15 |
|---|---|
| Ramadan | 2031 |
Born on December 15
In most horoscope tables, December 15 falls under Sagittarius, the sign that runs from November 22 to December 21.
The birthstone for December is the turquoise, and the American Gem Society also lists tanzanite, zircon and blue topaz.
December 15 every year from 1950 to 2049
Find the decade on the left, then the last digit of the year across the top. A baby born on December 15, 1990 arrived on a Saturday, and one born on December 15, 2000 on a Friday. Weekends are shaded.
| Years | …0 | …1 | …2 | …3 | …4 | …5 | …6 | …7 | …8 | …9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | Fri | Sat | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue |
| 1960s | Thu | Fri | Sat | Sun | Tue | Wed | Thu | Fri | Sun | Mon |
| 1970s | Tue | Wed | Fri | Sat | Sun | Mon | Wed | Thu | Fri | Sat |
| 1980s | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue | Thu | Fri |
| 1990s | Sat | Sun | Tue | Wed | Thu | Fri | Sun | Mon | Tue | Wed |
| 2000s | Fri | Sat | Sun | Mon | Wed | Thu | Fri | Sat | Mon | Tue |
| 2010s | Wed | Thu | Sat | Sun | Mon | Tue | Thu | Fri | Sat | Sun |
| 2020s | Tue | Wed | Thu | Fri | Sun | Mon | Tue | Wed | Fri | Sat |
| 2030s | Sun | Mon | Wed | Thu | Fri | Sat | Mon | Tue | Wed | Thu |
| 2040s | Sat | Sun | Mon | Tue | Thu | Fri | Sat | Sun | Tue | Wed |
When December 15 is on the same weekday again
After 2026, December 15 is next a Tuesday in 2037. The next weekend December 15 is in 2029, on a Saturday.
| Day of the week | Next year after 2026 |
|---|---|
| Monday | 2031 |
| Tuesday | 2037 |
| Wednesday | 2027 |
| Thursday | 2033 |
| Friday | 2028 |
| Saturday | 2029 |
| Sunday | 2030 |
December 15 by year
| Year | Day of the week | Weekend or weekday |
|---|---|---|
| 2023 | Friday | Weekday |
| 2024 | Sunday | Weekend |
| 2025 | Monday | Weekday |
| 2026 | Tuesday | Weekday |
| 2027 | Wednesday | Weekday |
| 2028 | Friday | Weekday |
| 2029 | Saturday | Weekend |
| 2030 | Sunday | Weekend |
| 2031 | Monday | Weekday |
| 2032 | Wednesday | Weekday |
| 2033 | Thursday | Weekday |
| 2034 | Friday | Weekday |
Why the weekday changes
A common year is 365 days, one day more than 52 weeks. So December 15 moves on one weekday each year: Tuesday in 2026, Wednesday in 2027. The jump is two days when February 29 comes in between, so December 15, 2028 is a Friday, two on from 2027's Wednesday. Between 1901 and 2099, the whole pattern repeats every 28 years.
More about December 15 on this site
December 15 questions
What day of the week is December 15, 2026?
December 15, 2026 is a Tuesday. It is day 349 of the year and falls in ISO week 51.
Is December 15 a holiday?
None of the holidays on this site is fixed to December 15. December 15, 2026 is not a US federal holiday. Some years it is Ramadan instead, as in 2031.
Cite this page
APA: ClockTotals. (2026, October 31). What Day of the Week Is December 15? https://clocktotals.com/what-day-is/december-15/
MLA: “What Day of the Week Is December 15?” ClockTotals, 31 Oct. 2026, clocktotals.com/what-day-is/december-15/.
Link (HTML): <a href="https://clocktotals.com/what-day-is/december-15/">What Day of the Week Is December 15?</a>