I’d bet that SD will be oficially done in april/may, but the release date will be July/august.
I think spring/summer reflects the first fiscal quarter of 2008 since april and may are in spring, and june is in summer.
Now we have narrowed the release date to a 3 month range.
According to wikipedia:
Spring: March 21 - June 21
Summer: June 21 - September 23
So the game is scheduled for any date between March 21st and September 23rd. If we take this as a fact, but assume a worst case scenario, the game should be released before the Autumn (fall) Equinox.
So in summary the game should be released in “less” than 226 days, that’s only about 19530000 seconds to go 
My God people why?! THERE IS NO RELEASE DATE YET!
Do not take any from a wiki for the absolute truth, by their nature they are inaccurate and waiting for an update.
no release date is true, but we did get a release window. Where all the new releases comes through that window.