At a Glance
September 18
Observances & Celebrations
Commemorative holidays, national days, religious feasts, and international traditions observed on this date.
FeaturedNational observance
National Day or Dieciocho (Chile)
Chile
Religious observance
Feast of Constantius (Theban Legion)
Religious observance
Feast of Edward Bouverie Pusey (Episcopal Church)
Religious observance
Feast of Eustorgius I
Religious observance
Feast of Joseph of Cupertino
Religious observance
Feast of Juan Macias
Religious observance
Feast of Methodius of Olympus
Religious observance
Feast of Richardis
Religious observance
Feast of September 18 (Eastern Orthodox liturgics)
Observance
Day of National Music (Azerbaijan)
Observance
Island Language Day (Okinawa Prefecture, Japan)
Observance
National HIV/AIDS and Aging Awareness Day (United States)
United States
Observance
Navy Day (Croatia)
Croatia
Observance