Las Posadas begins today! It's one of the most traditional ways to celebrate Christmas throughout Mexico and Latin America. The nightly celebration takes place at sunset with family and friends. There is prayer, singing, and a feast. Based on biblical narrative, Las Posadas is a 400 year old cultural celebration where participants reenact Mary and Joseph's search for lodging on their trip from Nazareth to Bethlehem. Every year the nine-day commemoration starts on December 16 and ends on Christma