The post office department was created by the Second Continental Congress on July 26, 1776.
8 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.
You can hear this line at 01:26:51 in the Blu-ray version of the movie.
Quote context
[...]
- I ask that you sign the commitment papers without further delay.
- Have you anything further to offer?
- Yes, I have, Your Honor. I'd like to submit the following facts in evidence.
- It concerns the post office department, an official agency of the United States government.
- The post office department was created by the Second Continental Congress on July 26, 1776.
- The first postmaster general was Benjamin Franklin.
- It has a great deal, Your Honor, if I may be allowed to proceed.
[...]