How do you know spring is coming?

1. My sister's birthday (happens to be near the vernal equinox)
   
2. We can strip down to two layers instead of four.
3. More bird poop on the car.
4. Less snow, more trash (unless you live in Beacon Hill or the Back Bay, which we don't)
5. 45 degrees is really good weather to take a walk
6. Some flowers are actually starting to bloom