Henry Day may refer to:
Pea Ridge Day (Henry Clyde Day, 1899–1934), pitcher in Major League Baseball Harry Day (rugby union) (Henry Thomas Day, 1863–1911), Welsh rugby union forward Henry Day (priest) (1865–1951), British priest Henry Noble Day (1808–1890), American philosopher Henry Day (British Army officer), British soldier
See also
Harry Day (disambiguation) Day (surname)