Dec. 21, 3:13 a.m. EST --

Full Cold Moon On occasion, this moon was also called the Moon before Yule. December is also the month the winter cold fastens its grip. Sometimes this moon is referred to as the Full Long Nights Moon and the term "Long Night" Moon is a very appropriate name because the nights are now indeed long and the Moon is above the horizon a long time. This particular full moon makes its highest arc across the sky because it's diametrically opposite to the low Sun. In fact, the moment of the Winter Solstice comes just over 15 hours after this full moon, at 6:38 p.m. EST.