May 18 Holidays & Observances
3 holidays observed on May 18 in the 2026–2030 window.
Floating holidays on May 18
These observances only land on May 18 in certain years.
| Holiday | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| Armed Forces Day | — | — | — | — | May 18 · Sat |
| National Bike to Work Day | — | — | — | May 18 · Fri | — |
View all May holidays
See every observance across May in one monthly calendar.
May calendar →May 18 — quick answers
- How many holidays fall on May 18?
- In the 2026–2030 window, 3 holidays and observance fall on May 18: International Museum Day, Armed Forces Day, National Bike to Work Day.
- What is celebrated on May 18?
- May 18 is home to International Museum Day, Armed Forces Day, National Bike to Work Day. Each one has its own page with history and a live countdown.
- Are any May 18 holidays public holidays?
- None of the observances on May 18 are US federal holidays; they are celebrated informally by people, brands and communities.