A cure for seasonal affective disorder

Those of you reading this in the southern hemisphere can still empathize I suspect. When the days are getting longer and the vernal equinox is nearing I always have this thought: Why don't we celebrate the Vernal Equinox? For that matter, why not make both the vernal and autumnal equinoxes national holidays? I have trouble with the holidays we have now, 50% of them seem geared to make us uberconsumers, and the other 50 have meaning to only a select few. Why not institute a holiday that has planet wide implications and meaning for everyone. Dionysian revelry late at night with friends and strangers would be appropriate for the vernal and the autumnal could be centered around home an hearth. All kinds of possibilities are inherent in such a celebration because it is inherently natural for us to be excited about the change of seasons. As an avid gardener, I am always chomping at the bit this time of year when the days are approaching 11 hrs long and moving towards twelve. Why not dance the night away this march 19th wherever you are, stay up late and greet the sunrise knowing that it marks the transition of a remarkable event you may only witness another 50 or so times before you die? Any takers?