In 2,000 years, our calendar has been through many changes and our year 1 A.D. may not be quite accurate. The astronomers tell us that there certainly was a starry wonder in the year 11 B.C. and maybe our calendar is 11 years late. In the fall of that year, Halley's comet was between the bright stars Castor and Pollux and once each day this dazzling spectacle passed directly over the little town of Bethlehem.
Edmund Halley predicted the return of his comet from old records dating back to 240 B.C, but the great astronomer did not live to see his comet prove him right. It came, as he said it would, in 1748 and, of all the days in the year, it was rediscovered on Christmas Day. This kind of heavenly evidence makes a comet more believable than the calendar.