May 22 Holidays & Observances
1 holiday observed on May 22 in the 2026–2030 window.
View all May holidays
See every observance across May in one monthly calendar.
May calendar →May 22 — quick answers
- How many holidays fall on May 22?
- In the 2026–2030 window, 1 holiday and observance falls on May 22: International Day for Biological Diversity.
- What is celebrated on May 22?
- May 22 is home to International Day for Biological Diversity. Each one has its own page with history and a live countdown.
- Are any May 22 holidays public holidays?
- None of the observances on May 22 are US federal holidays; they are celebrated informally by people, brands and communities.