((It's what is called a holographic picture. It's not a flat surface. It's a ridged, pattered surface, with a diffrent season on each side. As you shift your viewpoint, certain parts are no longer visible. This is the reason you can't see the winter in the reflection, and the summer in the not-reflection.))
I saw that exact thing in a store I went to last year. When you see it from different angles, it changes seasons. I took a video on my old phone I was so mesmerized by it XD
It's a Gallifreyan picture.
They're really cool
http://physics.stackexchange.com/questions/32956/how-does-a-holographic-object-change-perspective-when-the-image-is-rotated
"Why did I talk like that?"
It goes through all the seasons depending on where you stand