December 15, 2026 falls on a Tuesday
December 15, 2026 is a Tuesday. It is 83 days from today, September 23, 2026. The date is day 349 of 365 in 2026, it sits in ISO week 51, and it is the 15th of a 31-day month with 16 days after it.
What day of the week is December 15?
In 2026 it is a Tuesday. The weekday is not a property of the date itself, it is a property of the date in a given year, so the honest answer always names the year. A common year is 365 days, which is 52 weeks plus one spare day, so a fixed date moves forward one weekday from one year to the next. A leap year inserts a second spare day, so the step is two whenever 29 February falls inside the gap. That is why December 15 works its way around the week rather than repeating on a tidy schedule.
December 15 in the next few years
| Year | Weekday | Day of year | ISO week | Leap year |
|---|---|---|---|---|
| 2026 | Tuesday | 349 | 51 | no |
| 2027 | Wednesday | 349 | 50 | no |
| 2028 | Friday | 350 | 50 | yes |
| 2029 | Saturday | 349 | 50 | no |
| 2030 | Sunday | 349 | 50 | no |
| 2031 | Monday | 349 | 51 | no |
| 2032 | Wednesday | 350 | 51 | yes |
| 2033 | Thursday | 349 | 50 | no |
Between 2026 and 2027 the weekday moves from Tuesday to Wednesday, a step of 1. The day-of-year column also moves: December 15 is day 349 in a common year and day 350 in a leap year, because it sits after 29 February.
How often does December 15 fall at a weekend?
Counting the 28 occurrences from 2026 to 2053, December 15 lands on a Saturday 4 times and on a Sunday 4 times, so 8 of those 28 years put it at a weekend. Over a full 28-year stretch the Gregorian calendar repeats itself, and a fixed date visits each weekday four times, so the long-run answer is two weekend years in every seven.
Where December 15 sits in the calendar
December 15 is the 15th day of December, a month of 31 days in 2026, leaving 16 days of the month after it. Measured from 1 January it is 348 days into the year, and 16 days remain to 31 December, which puts it 95.6% of the way through 2026. In December 2026 the other Tuesdays are the 1st, 8th, 22nd, 29th, because weekdays repeat every seven days inside a month just as they do across one.
What else happens around December 15?
No holiday or widely marked observance falls within five days of December 15 in 2026, which makes it a quiet stretch of the calendar. The nearest marked dates either side can be found on the when is it index.
How far away is December 15?
The next December 15 is Tuesday, December 15, 2026, 83 days from today. That is 11 whole weeks and 6 days, or 11.9 weeks written as a decimal. To count towards it second by second, use the date calculator.
Questions
- What day of the week is December 15, 2026?
- A Tuesday. It is day 349 of 365 and falls in ISO week 51.
- What day of the week is December 15 next year?
- In 2027 it is a Wednesday.
- What number day of the year is December 15?
- Day 349 in a common year and day 350 in a leap year. See day 349 for more.
- Which week of the year is December 15 in?
- ISO week 51 in 2026. The week 51 page lists every date in it.
Nearby dates
The 15th of other months
All 366 dates · Week 51 · Day 349 of the year · Event countdowns · When is it? · Date calculator