Today, May 4, 2014, is National Orange Juice Day. Orange juice refers to the juice of oranges. It is made by squeezing the fresh orange, by drying and later re-hydrating the juice, or by concentration of the juice and later adding water to the concentrate. It is known for its health benefits, particularly its high concentration of vitamin C. It comes in several different varieties, including blood orange. In American English, the slang term O.J. may also be used to refer to orange juice. Orange Juice was adopted as the official beverage of Florida in 1967.