FOR THOUSANDS of years, the true new year’s eve was marked by the Sun, which marks the crest of light, beyond which the days lengthen and the nights shorten. In the astronomical cycle of the planet around its star, the weight that moves the pendulum of the seasons is all in the tilt of its axis. If there was, we would not have the alternation of spring, summer, autumn and winter. The winter solstice in the northern sky corresponds to the summer astronomy in the Southern hemisphere. Above and below, a tilting mirror, which affects the climate and, with it, also the society. From the stone age to that of social. The shortest day that there is