Saturnalia

Re-enactors from the Roman Deva Victrix 20th Legion parade through the city of Chester as they celebrate the ancient Roman festival of Saturnalia on December 20, 2012 in Chester, England. 

Saturnalia was the mid-winter feast when Romans commemorated the dedication of the temple of the god Saturn. Ancient Romans thought that celebrating Saturn would bring back the light and warmth of Summer. During the ancient festival there was a reversal of roles, with slaves wearing fine garments and sitting at the head of the table while they were waited upon by their masters. 

By Christopher Furlong/Getty Images.