Depending on who you talk to, either today is the first day of Fall or yesterday was. Time to celebrate by singing your favorite equinox carols and making offerings to Equi, the Solstice Killer. Equi comes down your vent pipes on Autumnal Equinox Eve and leaves the familiar sights of Fall in your hat, which you must hang by the ventpipes, because Equi is a lazy bastard. In the morning, you'll wake up and find colored leaves and decomposing garden waste in your cap, telling you that Fall has arrived.
Oh, sure, you could waste all your time celebrating the harvest, but you know and I know that your idea of "harvest" is going to the supermarket during a ten-for-ten sale. Get real. Join the rest of us and run nude through the streets and claim Equi's victory over the Summer.