Come 4:45 p.m., the boys of summer have gone.
In the Eastern Daylight Time zone, 4:44 p.m. will be the autumn equinox, the instant the sun from Earths perspecitive is directly over the equator, as this tilted, rotating planet on its revolution around our star turns its northern hemisphere out and its southern hemisphere in.
South of the equator, this is the vernal equinox, the first day of spring.
Here its fall. Say goodbye to summer. Welcome to autumn 2013.