Sailors in the western hemisphere will see the first lunar eclipse to fall on the solstice in the last 456 years. According to NASA, the last time the two celestial events happened at the same time was in AD 1554.
The eclipse begins on Tuesday morning, Dec. 21st, at 1:33 am EST (Monday, Dec. 20th, at 10:33 pm PST). At that time, Earth’s shadow will appear as a dark-red bite at the edge of the lunar disk. It takes about an hour for the “bite” to expand and swallow the entire Moon. Totality commences at 02:41 am EST (11:41 pm PST) and lasts for 72 minutes.
If you’re planning to dash out for only one quick look - it is December, after all - choose this moment: 03:17 am EST (17 minutes past midnight PST). That’s when the Moon will be in deepest shadow, displaying the most fantastic shades of coppery red.
NASA has a nice image showing this that doesn’t confuse people. Find it lower part of the page and read the ‘Moon, ‘right’ to ‘left’, if you can get to the site.
http://eclipse.gsfc.nasa.gov/OH/OH2010.html#LE2010Dec21T