Today might not be George Washington’s actual birthday (and it is definitely not “Presidents Day”), but it is the birthday of the US Post Office Department. It was on this day in 1792 that George Washington signed into law the Postal Service Act, which established the department. From Wikipedia:
The Postal Service Act signed by President George Washington on February 20, 1792, established the Department. Postmaster General John McLean was the first to call it the Post Office Department rather than just the “Post Office.” The organization received a boost in prestige when President Andrew Jackson invited his Postmaster General, William T. Barry, to sit as a member of the Cabinet in 1829. The Post Office Act of 1872 (17 Stat. 283) elevated the Post Office Department to Cabinet status.