Any cat will poke a paw at closed mini-blinds to peek at the new day outside.
Many cats will try to stick their head through the blinds to see better.
Some cats will nose under the blinds to push between them and the window.
Our Spidercat wiggled his entire body between two slats in the middle of the blinds to stand on the window sill between the blinds and the glass. (Okay, he was unsure about the pulling the final leg through. But he had the overall problem solved.)
I consider myself duly chastised for not having the blinds open early enough in the first place.
[Meanwhile, as I write this, Billy is lying on the desk looking out the window at the new day. I guess that makes it the sun desk.]