Basically just a bunch of former presidents glomming on to Washington's holiday:
Washington's Birthday is a United States regional holiday celebrated on the third Monday of February in honor of George Washington, the first President of the United States, who was born on February 22, 1732. Since the Uniform Federal Holidays Act of 1971, its observance can occur from February 15 to 21, inclusive.
The day is a state holiday in most states, with official names including Washington's Birthday, Presidents' Day, President's Day, and Washington's and Lincoln's Birthday. Depending upon the specific law, the state holiday might officially celebrate Washington alone, Washington and Abraham Lincoln (whose birthday is February 12), or some other combination of U.S. presidents (such as Washington and the third president Thomas Jefferson, who was born in April).
Surely at some point we should add a qualifier here like "Most of the Presidents' Day" or "All of the Presidents Except THAT GUY'S Day." We could even leave which one unspecified so that people could nurse their own personal dislikes, it would be just the kind of bipartisan gesture needed in an unhinged electorate.