logos change if the owners want them to, though perhaps not on a daily basis like this one. But look at how often Google uses special logos on its search homepage.
I don't like it. It gives me the creeps. The eyes seem to be leering at you watching your every move. Can we have the pointy hats back or at least something to do with autumn. Prefably not them brown leaves. Autumn has lovely colours of red, yellow and orange.