What Day of the Week Is December 1?
December 1, 2026 falls on a Tuesday.
It is day 335 of 2026, and 30 days of the year come after it. The date sits in ISO week 49 and in the fourth quarter, October to December. North of the equator it is day 71 of fall, and winter starts on December 21. In Australia and the rest of the south, it is spring. A last quarter falls on this date in US Eastern time. It is not a US federal holiday.
December 1 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 | 335 of 365 | 335 of 365 | 335 of 365 | 336 of 366 |
| Days left in the year | 30 | 30 | 30 | 30 |
| ISO week | 49 | 49 | 48 | 48 |
| Quarter | Q4 | Q4 | Q4 | Q4 |
| Season (north) | Day 71 of fall | Day 71 of fall | Day 70 of fall | Day 71 of fall |
| Moon (US Eastern) | Waxing gibbous | Last quarter | Waxing crescent | Full moon |
| US federal holiday | No | No | No | No |
| Other holidays | Cyber Monday, World AIDS Day | Giving Tuesday, World AIDS Day | World AIDS Day | World AIDS Day |
Holidays on December 1
Every year, December 1 is World AIDS Day.
Holidays that move with the calendar land on December 1 in some years from 2026 to 2035.
| Holiday or observance | Years on December 1 |
|---|---|
| Cyber Monday | 2031 |
| Giving Tuesday | 2026 |
| Advent Sunday | 2030 |
Born on December 1
In most horoscope tables, December 1 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 1 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 1, 1990 arrived on a Saturday, and one born on December 1, 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 1 is on the same weekday again
After 2026, December 1 is next a Tuesday in 2037. The next weekend December 1 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 1 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 1 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 1, 2028 is a Friday, two on from 2027's Wednesday. Between 1901 and 2099, the whole pattern repeats every 28 years.
More about December 1 on this site
December 1 questions
What day of the week is December 1, 2026?
December 1, 2026 is a Tuesday. It is day 335 of the year and falls in ISO week 49.
Is December 1 a holiday?
Every year, December 1 is World AIDS Day. December 1, 2026 is not a US federal holiday.
Cite this page
APA: ClockTotals. (2026, October 20). What Day of the Week Is December 1? https://clocktotals.com/what-day-is/december-1/
MLA: “What Day of the Week Is December 1?” ClockTotals, 20 Oct. 2026, clocktotals.com/what-day-is/december-1/.
Link (HTML): <a href="https://clocktotals.com/what-day-is/december-1/">What Day of the Week Is December 1?</a>