Thus the kings of antiquity closed the passes At the time of solstice. Merchants and strangers did not go about… The winter solstice has always been celebrated in China as the resting time of the year.
The winter solstice is identified as the archetypal Turning Point (hexagram Fu) in which nascent yang energy must be protected by collective rest so that renewal is not prematurely dissipated.
, The I Ching or Book of Changes, 1950thesis