For those of us who approach things by the Goldilocks Principle (not too little, not too much), spring equinox is practically perfect. Along with the fall equinox, this is when we get that glorious balance of daytime and nighttime all over the world — from the steamy equator to the frigid poles — with just about 12 hours of each.

Spring Equinox is rapidly approaching. When is the first day of spring? What we know about when spring starts, winter ends, summer solstice and more.