Milk Day

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