I know it's still winter, but the snow splash screen at the beginning when you start the game seems more like Christmas-like. In some parts of the world, there is no snow right now or it isn't even winter.
I would have like to see it raining hearts or something else during Valentines Day.
Easter is coming up, perhaps some Easter Eggs (no pun intended) around the screen.
And lots of other days coming up.
And we could have had something nice for the olympics too =)
Although immensely unnecessary, would be cool if anyone got a bit lazy and just felt like throwing something together.