August 20 Holidays & Observances
1 holiday observed on August 20 in the 2026–2030 window.
View all August holidays
See every observance across August in one monthly calendar.
August calendar →August 20 — quick answers
- How many holidays fall on August 20?
- In the 2026–2030 window, 1 holiday and observance falls on August 20: World Mosquito Day.
- What is celebrated on August 20?
- August 20 is home to World Mosquito Day. Each one has its own page with history and a live countdown.
- Are any August 20 holidays public holidays?
- None of the observances on August 20 are US federal holidays; they are celebrated informally by people, brands and communities.