October 21 Holidays & Observances
2 holidays observed on October 21 in the 2026–2030 window.
Floating holidays on October 21
These observances only land on October 21 in certain years.
| Holiday | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| Sweetest Day | — | — | Oct 21 · Sat | — | — |
View all October holidays
See every observance across October in one monthly calendar.
October calendar →October 21 — quick answers
- How many holidays fall on October 21?
- In the 2026–2030 window, 2 holidays and observance fall on October 21: Sweetest Day, Back to the Future Day.
- What is celebrated on October 21?
- October 21 is home to Sweetest Day, Back to the Future Day. Each one has its own page with history and a live countdown.
- Are any October 21 holidays public holidays?
- None of the observances on October 21 are US federal holidays; they are celebrated informally by people, brands and communities.