(CNN) -- When your mail carrier shows up Tuesday, make sure to pop your head out and thank them.
February 4th is National Thank A Mail Carrier Day!
In honor of the day, here are a few fun facts:
- The first organized mail service in America was established in 1775.
- Benjamin Franklin was the first Postmaster General.
- Stamps were invented in 1847.
- and Zip codes have been around since 1963.
