Points along the path as the earth turns aren't part of a religion for me. I notice the Pagan and Christian, and sometimes other markers for stops along the seasonal paths, but I don't notice them in terms of gods or goddesses or the supernatural.
They keep my eyes and ears open.
They tie me to the earth, and that's important for me. Keeping my awareness on the planet (and the universe) that, probably without even knowing it, keeps conditions so that I can live the life I live now, helps me remember that one of my responsibilities is to care for it. One reason I like geography is that it's about something, some place, I love -- and if we love something, why wouldn't we want to learn more about it and take care of it?
Not only does the Time and Date link have a great explanation of how and why the equinox is what it is, it's full of more awesome links to information and fun.
Today, I'm heading out into the garden to separate the green-bin pruning from the compost-pile pruning, to pull down the remains of the corn, harvest some potatoes, sort out some pole-bean seeds for saving (and feed the rest to the chickens), and start preparing the planting beds for fall's parsnips, spinach, lettuce, carrots, and sugar snap peas.
Photos thanks to Wolfgang Staudt and kganes via Flickr's creative commons search.