September 21, 2010 7:45pm CST
The Vernal Equinox is March 20th, the Summer Solstice is June 21st and the Winter Solstice is Dec 21st. These stay the same every year. Can anyone tell me why the Autumnal Equinox is either Sept. 22 or 23rd? I am very confused by this and have always actually thought it was Sept 21.