December 21 Holidays & Observances
3 holidays observed on December 21 in the 2026–2030 window.
Floating holidays on December 21
These observances only land on December 21 in certain years.
| Holiday | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| Hanukkah | — | — | — | — | Dec 21 · Sat |
| December Solstice | Dec 21 · Mon | — | Dec 21 · Thu | Dec 21 · Fri | Dec 21 · Sat |
| National Ugly Christmas Sweater Day | — | — | — | Dec 21 · Fri | — |
View all December holidays
See every observance across December in one monthly calendar.
December calendar →December 21 — quick answers
- How many holidays fall on December 21?
- In the 2026–2030 window, 3 holidays and observance fall on December 21: Hanukkah, December Solstice, National Ugly Christmas Sweater Day.
- What is celebrated on December 21?
- December 21 is home to Hanukkah, December Solstice, National Ugly Christmas Sweater Day. Each one has its own page with history and a live countdown.
- Are any December 21 holidays public holidays?
- None of the observances on December 21 are US federal holidays; they are celebrated informally by people, brands and communities.