Today,  December 21, is the shortest day of the year in the Northern Hemisphere , which makes it the longest day of the year for places below the equator.  The winter solstice occurs at 10:27 PM ET.  Some countries celebrate this day: Iranians celebrate Yalda, meaning birth or rebirth.  Something to do with the sun god Mithra.  Families gather to eat, drink, read poetry through the night and welcome the sunrise. It's called Dongzhi in China, meaning winter's arrival.  Again, family time, with a hearty meal of glutinous rice balls or dumplings. The Native American Hopi tribe in the Southwest has a Soyal ceremony lasting up to 16 days.  A time for prayer and purification. Japan has Toji, a custom involving taking a hot bath with yuzu, a citrus fruit, and eating kabocha, winter squash, plus foods that contain the "n" sound, like udon.  Why?  Brings good luck. In a  July posting , I said: FAT? SKINNY? NORMAL? APPARENTLY, NO EFFECT ON LONGEVITY. By long-established Body-Ma