Washington’s Birthday: the Federal Holiday – Pieces of History

George Washington, copy of painting by Gilbert Stuart. National Archives Identifier 532888. Washington was born in Virginia on February 11, 1731, according to the then-used Julian calendar. In 1752 Britain and all its colonies adopted the Gregorian calendar, which moved Washington’s birthday a year and 11 days. …

https://prologue.blogs.archives.gov/2025/02/11/washingtons-birthday-the-federal-holiday/