This is the first time Aaron Sorkin uses the title "What Kind If Day Has It Been". He would later go on to use it for the first season finales of The West Wing and Studio 60 on the Sunset Strip, as well as the series finale of The Newsroom.
In the scenes where Dana is setting up her camera for a group photo, the back of the camera goes from open to closed, depending on whether the perspective is in front or in back of the camera.