The third of October, 1949, was the 2,500th anniversary of Confucius’ birth. This date has been under dispute for more than 2,000 years. Early and reliable accounts state that the birth was on a certain day of the Chinese sixty-day cycle and that it was fifty days after an eclipse of the sun. But those same accounts list eclipses of the sun in two successive months, something that is impossible in China. Only recently has any one bothered to calculate which eclipse actually occurred and discover that, in a period of twenty years before and after the birth, only one eclipse of the sun occurred on that day of the cycle and was visible at Confucius’ birthplace. So this date can be fixed accurately by modern scientific methods.1