Milk Day may be a reference to: Harvard Milk Day, an unofficial celebration in Harvard, Illinois, USA Harvey Milk Day, a celebration of the life of Harvey Milk, a murdered gay rights activist World Milk Day, a United Nations organized day to celebrate the importance of milk National Milk Day (India), an observance of Verghese Kurien's birthday by the Indian milk industry
See also Martin Luther King Jr. Day, often written as MLK Day