Saint Patrick's Day is a cultural and religious celebration held on March 17.
Saint Patrick's Day or Patrick's Day may also refer to:
- St. Patrick's Day (album), an album by Bing Crosby
- Patrick's Day (film), a 2014 Irish film
- St Patrick's Day (play), an 18th-century British play
- "St. Patrick's Day" (The Office), an episode of The Office
- "St. Patrick's Day" (30 Rock), an episode of 30 Rock
- Saint Patrick's Day Test, a rugby match