Once in about 400-500 year event - a total lunar eclipse that occurs on the Winter Solstice. Everybody get naked and dance around the favorite obelisk of your choice and pay homage to the gods.
The December 21 lunar eclipse will be visible to observers in North America and western South America. NASA InfoEarly in the morning on December 21 a total lunar eclipse will be visible to sky watchers across North America (for observers in western states the eclipse actually begins late in the evening of December 20), Greenland and Iceland. Viewers in Western Europe will be able to see the beginning stages of the eclipse before moonset, and in western Asia the later stages of the eclipse will be visible after moonrise.
From beginning to end, the eclipse will last about three hours and twenty-eight minutes. For observers on the east coast of the U.S. the eclipse lasts from 1:33am EST through 5:01 a.m. EST. Viewers on the west coast will be able to tune in a bit earlier. For them the eclipse begins at 10:33 p.m. PST on December 20 and lasts until 2:01am PST on Dec. 21. Totality, the time when Earth's shadow completely covers the moon, will last a lengthy 72 minutes.
When will the Eclipse Occur?
The eclipse’s total phase lasts for 72 minutes. The penumbral eclipse ("P1") begins at 05:29:17 Universal Time (UT) and the partial eclipse ("U1") starts at 06:32:37 UT. The total eclipse ("U2") begins at 07:40:47 UT and the point of the greatest eclipse occurs at 08:16:57 UT. The moon lies near the zenith for observers in southern California and Baja Mexico at the instant of the greatest eclipse. The umbral magnitude peaks at 1.2561 as the moon’s southern limb passes 2.8 arc minutes north of the shadow’s central axis. Therefore, the moon’s southern half will seem much darker than the northern half because it lies deeper in the umbra.
Since the moon samples a large range of umbral depths during totality, its appearance will change dramatically with time. The total eclipse ("U3") ends at 08:53:08 UT, followed by the end of the partial eclipse ("U4") at 10:01:20 UT. The penumbral eclipse ("P4") ends at 11:04:31 UT.
http://www.timeanddate.com/eclipse/lunar-eclipse-december-21-2010.html