Presidents' Day, is a federal holiday celebrated in the United States on the third Monday of February each year. 

It was originally established to honor the first President of the United States, George Washington 

Over time, Presidents' Day has evolved to honor not only George Washington but also Abraham Lincoln and other past presidents. 

While it is a federal holiday, Presidents' Day is not observed uniformly across all states 

when the Uniform Monday Holiday Act was enacted, moving the celebration  from Washington's actual birthday to the third Monday in February. 

The Uniform Monday Holiday Act was aimed at providing more three-day  weekends for workers, boosting the tourism industry and stimulating the  economy. 

The holiday was first observed in 1885 to commemorate Washington's contributions to the nation.