While looking at some of my past summer rants I started checking links and came across some interesting information. First off, there's a page mentioning how some meterologists count the entire months of September, October and November as Autumn. Bah..I'm sticking to my summer shade methodology.
A better page I found was a complete listing of all the equinox and solstice dates and times until the year 2014. Never be late again for that spring equinox or summer solstice party.