St. John's Day
St. John's Day may refer to:
Feasts celebrating the Nativity of Saint John the Baptist:
- January 7, an Eastern Orthodox feast
 - June 24, Midsummer Day 
- an Eastern Orthodox feast celebrating his birth
 - a Roman Catholic, Lutheran and Anglican feast celebrating his birth
 
 - August 29, an Eastern Orthodox feast commemorating his beheading
 - September 23 
- an Eastern Orthodox feast celebrating his conception
 - a Roman Catholic and Lutheran feast celebrating his conception
 
 - Thout 2, a Coptic Orthodox feast
 - Dehwa Daimana (Mandaean feast): 1st day of Hiṭia, the 11th month of the Mandaean calendar
 
Feasts celebrating John the Evangelist
- December 27, a Roman Catholic, Lutheran, and Anglican feast
 - May 8, an Eastern Orthodox feast
 
See also
- Saint John's Day