To the other 99.9% of the world, it's called the Equinox - Vernal in the northern hemisphere, Autumnal in the southern hemisphere.
I guess acknowledging Western Civilization by mentioning that fact didn't fit on his teleprompter.
I guarantee you this isn't an accident. Obama loathes western culture. It's evident in many of the statements he makes and the timing of events. Recall last September when he pulled the missle shield out of Poland on the 70th anniversary of the NAZI invasion? The timing of that announcement was not an accident......