Presidents’ Day, the third Monday in February, as we know it today, was first celebrated in 1971, after the 1968 passage of the Uniform Monday Holiday Act moved the observance of several federal holidays to Mondays.

Before then, Washington’s Birthday was celebrated on his actual birthday, February 22, and in Illinois, Lincoln’s Birthday was celebrated on his birthday, February 12.

For more information, check out this link to History.com: https://www.history.com/topics/holidays/presidents-day