According to History.com, the story of Presidents Day date begins in 1800. Following the death of George Washington in 1799, his February 22 birthday became a perennial day of remembrance.
At the time, Washington was venerated as the most important figure in American history, and events like the 1832 centennial of his birth and the start of construction of the Washington Monument in 1848 were cause for national celebration.
While Washington’s Birthday was an unofficial observance for most of the 1800s, it was not until the late 1870s that it became a federal holiday. Senator Steven Wallace Dorsey of Arkansas was the first to propose the measure, and in 1879 President Rutherford B. Hayes signed it into law.
The holiday initially only applied to the District of Columbia, but in 1885 it was expanded to the whole country. At the time, Washington’s Birthday joined four other nationally recognized federal bank holidays—Christmas Day, New Year’s Day, the Fourth of July and Thanksgiving—and was the first to celebrate the life of an individual American. Martin Luther King Jr. Day, signed into law in 1983, was the second.