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" This year\u00A0we&amp;#039;re going to have a white Christmas. At least in the sky, anyway. For the first time since 1977, there will be a full moon on Christmas Day. The full moon\u00A0lands on or near the same calendar day every 19 years.\u00A0This\u00A0occurrence is known as the Metonic cycle, named for the 5th century B.C. astronomer Meton of Athens, who discovered the pattern. In 1996, however, the December full moon occurred at 3:41 p.m. Eastern time on December 24 (the moon is only completely full for an instant). So the world waited another 19 years. The official full moon will occur at 6:11 a.m. Eastern time on December 25. For all intents and purposes, the moon will be full both tonight and tomorrow night. Enjoy it, because the next one won&amp;#039;t roll around until 2034. Source: EarthSky "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/space/moon-mars/a18732/first-full-moon-christmas-38-years/>