Happy Day may refer to:

• The Happy Day, a 1916 musical comedy
• Happy Day (album), a 2008 album by Tim Hughes
• "The Happy Day" (Ashes to Ashes), an episode of Ashes to Ashes
• Hap Day (1901–1990), Canadian professional hockey player
• "Happy Day", a 1994 song by house musical duo Uncanny Alliance
• "Happy Day", a song by Talking Heads from their 1977 album Talking Heads: 77
• "Happy Day" (song), a 2014 song by Georgian singer Lizi Pop
• Happy Day (film), a 1939 Egyptian film
• The Happy Day (picture book), a 1949 picture book
• "Happy Day," a 1755 hymn by Philip Doddridge

See also

• International Day of Happiness
• All pages with titles beginning with Happy Day
• All pages with titles containing Happy Day
• Happy Days (disambiguation)
• Oh Happy Day (disambiguation)