It is not new to celebrate the life-giving force of the sun. Cultures have done so for thousands of years - most have days named in honor of the sun. Simply put, we are here because there is a sun.
Today, at least from my limited US view, Sunday has become a weekend day. Don't get me wrong, it's a great day and I'm not giving it back. But I am going to celebrate each time I feel the warm rays of the giant orb, being grateful for the unseen photosynthesis that sustains our planet.