Oh yeah, the blood is really flowing here. In addition to gardening and baking, here are some more things I like to do for the equinox:
Wash the windows (or, around here, with the abundance of eager young climbers, get the windows washed) to let in all the new light. (Schedule it again for the September equinox to let in all the fading light!)
Spin in the spring and flip in the fall (that is how to rotate your mattress or futon for optimum, even wear).
Change batteries in smoke detectors on “spring forward” day.
Spring cleaning---open all the windows and really watch the dust fly.
More ideas? Post yours!