So I was just outside on our porch. The weather is beautiful: sunny and long-sleeve-shirt-warm. I heard two things that made me think of Spring:

1. A moped; a kid who lives around the corner likes to drive his moped down around our cul-de-sac and back up to his house. He was doing that all last summer, and I heard that sound again today.
2. Gunshots; I can hear the distant sound of gunfire from a shooting range that is a few miles from our house.