Native American Day is a state holiday in California, established in 1968 to honor Native American cultures and contributions to the state and the United States. Also called American Indian Day, it is observed annually on the fourth Friday in September.

In 1968, Governor Ronald Reagan signed a resolution calling for a holiday called American Indian Day, to be held the Fourth Friday in September. In 1998, the California Assembly passed AB 1953, which made Native American Day an official state holiday.