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