Las Posadas is a nine-day celebration with origins in Spain, now celebrated chiefly in Mexico, Guatemala and parts of the Southwestern United States^[1][2], beginning December 16th and ending December 24th, on evenings (about 8 or 10 PM).

Posada is Spanish for "lodging", or "accommodation"; it is said in plural because it is celebrated more than one day in that period. The nine day novena represents the nine months of pregnancy.^[3][4]