@ nothingfancybakery a little bit more about this fascinating tradition , you ’ ll consider hosting one . Posadas originated in Spain , then brought to Mexico , where they were gladly adopted as their own . They are usually celebrated from December 16th until the 23rd , symbolizing the Virgin Mary ’ s nine months of pregnancy and culminating the day before Nochebuena . Although some begin exactly on December 12th , which is the day of the virgin Mary , ending on the 20th . The usual beverage offered during a posada is ponche , which is made out of delicious seasonal fruits such as tejocote , guavas , prunes , sugarcane , and reeds . These are all put to