December 18 Holidays & Observances
2 holidays observed on December 18 in the 2026–2030 window.
Floating holidays on December 18
These observances only land on December 18 in certain years.
| Holiday | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| National Ugly Christmas Sweater Day | Dec 18 · Fri | — | — | — | — |
View all December holidays
See every observance across December in one monthly calendar.
December calendar →December 18 — quick answers
- How many holidays fall on December 18?
- In the 2026–2030 window, 2 holidays and observance fall on December 18: National Ugly Christmas Sweater Day, International Migrants Day.
- What is celebrated on December 18?
- December 18 is home to National Ugly Christmas Sweater Day, International Migrants Day. Each one has its own page with history and a live countdown.
- Are any December 18 holidays public holidays?
- None of the observances on December 18 are US federal holidays; they are celebrated informally by people, brands and communities.