On August 18, 2025, the following holidays and observances are recognized around the world:
Public & National Holidays
- Discovery Day (Yukon, Canada) — regional holiday.
- Assumption Day Holiday (Colombia) — observed in lieu of the main religious holiday.
- Bank Holiday (Indonesia) — nationwide bank holiday tied to Independence celebrations.
- 50th Anniversary of the FALINTIL (Timor-Leste, selected regions) — regional government holiday.
Notable Fun & Observance Days
- Cupcake Day (Australia)
- Helium Discovery Day
- Mail Order Catalog Day
- National Bad Poetry Day
- National Fajita Day (U.S.)
- National Ice Cream Pie Day
- Never Give Up Day (International)
- Pinot Noir Day
- Serendipity Day
- Stay Home with Your Kids Day (U.S.)
Religious & Cultural Observances
- While August 15 is celebrated as the Assumption of the Virgin Mary in the Catholic and Orthodox Christian calendars, in Colombia this is observed as a public holiday on August 18 in 2025.
- No major new religious holiday specifically falls on August 18, but the period includes adjacent celebrations (e.g., Krishna Janmashtami, Aug 16).
Internationally Observed
- No official United Nations day falls on August 18, 2025.
This date is marked by a blend of public, quirky, and cultural holidays across different countries.
