I realize that Spring comes earlier to Philly than it does up here. If you have daffs in bloom, it could also be scilla:
That might be it. Looks more like what I remember, anyway.
The daffodils are just coming into bloom. Many more have buds. Plus, you can see the buds on some trees swelling larger each day.
Yesterday afternoon was so nice that instead of going to the gym after work, I just walked home. I was carrying my gym gear with me, and by the time I had walked--briskly--the roughly 29 blocks, I actually had worked up a sweat. It's even warmer this afternoon.