Eggs/Mail will not be stuck in the Post Office over the week end if shipped on a Saturday. The Mail Never Stops Moving. Even if your PO is closed to the Public the mail keeps moving across country in Trucks or Planes. If I mail a Box On a Saturday you should get it Monday Morning. I have a good relation ship with my PO they are happy to call me after hours to come down and pick up eggs at the back door. I even got a call on Thankgiving 2006 To run to town for My gray silkie eggs from Ladonna Heart. Most PO even get mail in on Sundays. So be nice to your PO workers and they will be nice to you. Have your Phone Number put on the box and ask your PO to call you when the arrive.