It's not so much biking to work that makes it spring -- some years it's springtime for weeks before the salt is all washed off the roads. It's not even seeing posts from my friends saying they're biking to work. More than that, the things that are telling me it's spring are textile. Yesterday I hung up sheets on the line to dry instead of putting them in the dryer, and I haven't been needing the long underwear so much. And that last one leads to the thing that really tips it off: For the first time in a while, I'm wearing an Aloha shirt today.