The Full Moon this month is traditionally called the Christmas, Yule or Long Night Moon, being the full moon nearest the longest night of the year. The Lakota Sioux called it the Moon of the Popping Trees. The Cheyenne called it: Big Freezing Moon. BY: Gail S. Cleere 202/653-1541 NAVOBSY WASH This news release may be reproduced, with credit please, to the U.S. Naval Observatory.