Solstice has had significance for pre-christian and pagan societies for as long as there is history. I'm rather surprised nobody here has mentioned it, as the reason it was significant to those societies was it meant that the days would begin getting longer again--it marked the beginning of winter, and the turning point toward the warmth and agriculture of spring. Y'all are farmers and ranchers, y'all should pay attention to this stuff! It is time for celebration, or at least recognition. It all gets lighter from here!