What Day of the Week Is December 18?
December 18, 2026 falls on a Friday.
It is day 352 of 2026, and 13 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 88 of fall, and winter starts on December 21. In Australia and the rest of the south, it is spring. The Moon is a waxing gibbous that day, and the next full moon is on Wednesday, December 23, 2026. It is not a US federal holiday.
December 18 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 | Thursday | Friday | Saturday | Monday |
| Day of the year | 352 of 365 | 352 of 365 | 352 of 365 | 353 of 366 |
| Days left in the year | 13 | 13 | 13 | 13 |
| ISO week | 51 | 51 | 50 | 51 |
| Quarter | Q4 | Q4 | Q4 | Q4 |
| Season (north) | Day 88 of fall | Day 88 of fall | Day 87 of fall | Day 88 of fall |
| Moon (US Eastern) | Waning crescent | Waxing gibbous | Waning gibbous | Waxing crescent |
| US federal holiday | No | No | No | No |
| Other holidays | – | – | – | – |
Holidays on December 18
None of the 245 holidays and observances on this site is fixed to December 18.
Born on December 18
In most horoscope tables, December 18 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 18 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 18, 1990 arrived on a Tuesday, and one born on December 18, 2000 on a Monday. Weekends are shaded.
| Years | …0 | …1 | …2 | …3 | …4 | …5 | …6 | …7 | …8 | …9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | Mon | Tue | Thu | Fri | Sat | Sun | Tue | Wed | Thu | Fri |
| 1960s | Sun | Mon | Tue | Wed | Fri | Sat | Sun | Mon | Wed | Thu |
| 1970s | Fri | Sat | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue |
| 1980s | Thu | Fri | Sat | Sun | Tue | Wed | Thu | Fri | Sun | Mon |
| 1990s | Tue | Wed | Fri | Sat | Sun | Mon | Wed | Thu | Fri | Sat |
| 2000s | Mon | Tue | Wed | Thu | Sat | Sun | Mon | Tue | Thu | Fri |
| 2010s | Sat | Sun | Tue | Wed | Thu | Fri | Sun | Mon | Tue | Wed |
| 2020s | Fri | Sat | Sun | Mon | Wed | Thu | Fri | Sat | Mon | Tue |
| 2030s | Wed | Thu | Sat | Sun | Mon | Tue | Thu | Fri | Sat | Sun |
| 2040s | Tue | Wed | Thu | Fri | Sun | Mon | Tue | Wed | Fri | Sat |
When December 18 is on the same weekday again
After 2026, December 18 is next a Friday in 2037. The next weekend December 18 is in 2027, on a Saturday.
| Day of the week | Next year after 2026 |
|---|---|
| Monday | 2028 |
| Tuesday | 2029 |
| Wednesday | 2030 |
| Thursday | 2031 |
| Friday | 2037 |
| Saturday | 2027 |
| Sunday | 2033 |
December 18 by year
| Year | Day of the week | Weekend or weekday |
|---|---|---|
| 2023 | Monday | Weekday |
| 2024 | Wednesday | Weekday |
| 2025 | Thursday | Weekday |
| 2026 | Friday | Weekday |
| 2027 | Saturday | Weekend |
| 2028 | Monday | Weekday |
| 2029 | Tuesday | Weekday |
| 2030 | Wednesday | Weekday |
| 2031 | Thursday | Weekday |
| 2032 | Saturday | Weekend |
| 2033 | Sunday | Weekend |
| 2034 | Monday | Weekday |
Why the weekday changes
A common year is 365 days, one day more than 52 weeks. So December 18 moves on one weekday each year: Friday in 2026, Saturday in 2027. The jump is two days when February 29 comes in between, so December 18, 2028 is a Monday, two on from 2027's Saturday. Between 1901 and 2099, the whole pattern repeats every 28 years.
More about December 18 on this site
December 18 questions
What day of the week is December 18, 2026?
December 18, 2026 is a Friday. It is day 352 of the year and falls in ISO week 51.
Is December 18 a holiday?
None of the holidays on this site is fixed to December 18. December 18, 2026 is not a US federal holiday.
Cite this page
APA: ClockTotals. (2026, October 31). What Day of the Week Is December 18? https://clocktotals.com/what-day-is/december-18/
MLA: “What Day of the Week Is December 18?” ClockTotals, 31 Oct. 2026, clocktotals.com/what-day-is/december-18/.
Link (HTML): <a href="https://clocktotals.com/what-day-is/december-18/">What Day of the Week Is December 18?</a>