I can tell it's winter...

I can tell it's winter when...
...I put on multiple layers to stay inside my house.
...the sun goes down and my neighborbood becomes more brightly lit then it was at noon.
...the weather forecast switches from 'chance of rain' to 'chance of sun'.
...my neighbor gets out his chainsaw for firewood and not for remodeling.
...the local soft rock station plays holiday music 24 hours a day for 40 days.
...the late night sob-story DJ on the aforementioned station thinks 'Little Drummer Boy' is going to cheer up the lovelorn people who phone in.