Have been pondering this for a week now cause the warmer weather causes things to get stragne around my place. Like the clippers come out and a number two blade guard goes on and the mass of hair I've been growing since I last cut my hair (read October) gets shorn and there are clumps of leg hair in the razor in the shower, not because the girlfriend's been over.
All the bikes get washed, especially the ones I rode all winter, so they aren't being stored with the grim and salt from the roads, although this winter wasn't much for snow. My tights get washed one last time before they are boxed up till next winter.
I guess it a sure sign that spring, and the bike season is apon us, or at least me.
How do you know it's Spring?