George Washington was born on February 11, 1732. Yes, that’s February 11. The British colonies (which is what the United States of America was then) still used the “old style” , or Justinian, calendar. They didn’t begin using the Gregorian (or new style) until 1752, when George would have been 20 years of age, and before we declared our Independence from Great Britain.
Then George’s birthday was changed to February 22, because of corrections in the dates of the new calendar. When our new President’s Day celebration began, the celebrations of George Washington’s and Abraham Lincoln’s birthday were combined to create this holiday. Now many have forgotten George Washington’s birthday all together.