But it was a pagan holiday introduced in AD 274 by the Roman emperor Aurelian to celebrate the birthday of the sun god, Sol Invictus (the unconquerable sun).
Mmusi wa pagane Roma eleng Aurelian akopanya hape mmuso wa Roma ka 274 AD a keteka tsatsi la 25 Tshitwe eleng tswalo ya modingwana wa letsatsi, Sol Invictus.