What Day of the Week Is December 31?
December 31, 2026 falls on a Thursday.
It is the last day of 2026, day 365 of 365. The date sits in ISO week 53 and in the fourth quarter, October to December. North of the equator it is day 11 of winter, and spring starts on March 20, 2027. In Australia and the rest of the south, it is summer. The Moon is a waning crescent that day, and the next full moon is on Friday, January 22, 2027. It is not a US federal holiday.
December 31 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 | Wednesday | Thursday | Friday | Sunday |
| Day of the year | 365 of 365 | 365 of 365 | 365 of 365 | 366 of 366 |
| Days left in the year | 0 | 0 | 0 | 0 |
| ISO week | 1 (2026) | 53 | 52 | 52 |
| Quarter | Q4 | Q4 | Q4 | Q4 |
| Season (north) | Day 11 of winter | Day 11 of winter | Day 11 of winter | Day 11 of winter |
| Moon (US Eastern) | Waxing gibbous | Waning crescent | Waxing crescent | Full moon |
| US federal holiday | No | No | Observed New Year's Day | No |
| Other holidays | New Year's Eve | New Year's Eve | New Year's Eve | New Year's Eve |
Holidays on December 31
Every year, December 31 is New Year's Eve.
From 2026 to 2035, no moving holiday on the site lands on this date.
Born on December 31
In most horoscope tables, December 31 falls under Capricorn, the sign that runs from December 22 to January 19.
The birthstone for December is the turquoise, and the American Gem Society also lists tanzanite, zircon and blue topaz.
December 31 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 31, 1990 arrived on a Monday, and one born on December 31, 2000 on a Sunday. Weekends are shaded.
| Years | …0 | …1 | …2 | …3 | …4 | …5 | …6 | …7 | …8 | …9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | Sun | Mon | Wed | Thu | Fri | Sat | Mon | Tue | Wed | Thu |
| 1960s | Sat | Sun | Mon | Tue | Thu | Fri | Sat | Sun | Tue | Wed |
| 1970s | Thu | Fri | Sun | Mon | Tue | Wed | Fri | Sat | Sun | Mon |
| 1980s | Wed | Thu | Fri | Sat | Mon | Tue | Wed | Thu | Sat | Sun |
| 1990s | Mon | Tue | Thu | Fri | Sat | Sun | Tue | Wed | Thu | Fri |
| 2000s | Sun | Mon | Tue | Wed | Fri | Sat | Sun | Mon | Wed | Thu |
| 2010s | Fri | Sat | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue |
| 2020s | Thu | Fri | Sat | Sun | Tue | Wed | Thu | Fri | Sun | Mon |
| 2030s | Tue | Wed | Fri | Sat | Sun | Mon | Wed | Thu | Fri | Sat |
| 2040s | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue | Thu | Fri |
When December 31 is on the same weekday again
After 2026, December 31 is next a Thursday in 2037. The next weekend December 31 is in 2028, on a Sunday.
| Day of the week | Next year after 2026 |
|---|---|
| Monday | 2029 |
| Tuesday | 2030 |
| Wednesday | 2031 |
| Thursday | 2037 |
| Friday | 2027 |
| Saturday | 2033 |
| Sunday | 2028 |
December 31 by year
| Year | Day of the week | Weekend or weekday |
|---|---|---|
| 2023 | Sunday | Weekend |
| 2024 | Tuesday | Weekday |
| 2025 | Wednesday | Weekday |
| 2026 | Thursday | Weekday |
| 2027 | Friday | Weekday |
| 2028 | Sunday | Weekend |
| 2029 | Monday | Weekday |
| 2030 | Tuesday | Weekday |
| 2031 | Wednesday | Weekday |
| 2032 | Friday | Weekday |
| 2033 | Saturday | Weekend |
| 2034 | Sunday | Weekend |
Why the weekday changes
A common year is 365 days, one day more than 52 weeks. So December 31 moves on one weekday each year: Thursday in 2026, Friday in 2027. The jump is two days when February 29 comes in between, so December 31, 2028 is a Sunday, two on from 2027's Friday. Between 1901 and 2099, the whole pattern repeats every 28 years.
More about December 31 on this site
December 31 questions
What day of the week is December 31, 2026?
December 31, 2026 is a Thursday. It is day 365 of the year and falls in ISO week 53.
Is December 31 a holiday?
Every year, December 31 is New Year's Eve. December 31, 2026 is not a US federal holiday.
Cite this page
APA: ClockTotals. (2026, October 21). What Day of the Week Is December 31? https://clocktotals.com/what-day-is/december-31/
MLA: “What Day of the Week Is December 31?” ClockTotals, 21 Oct. 2026, clocktotals.com/what-day-is/december-31/.
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