Epona's feast day in the Roman calendar was given as December 18 on a rustic calendar from Guidizzolo, Italy,Vaillant, 1951. although this may have been only a local celebration. She was incorporated into the imperial cult by being invoked on behalf of the Emperor, as Epona Augusta or Epona Regina.
epOna's feAST daY In THe roman cAlendar was giVen As decemBer 18 on a rUstic cAlEndaR FRom GuidiZzOLo, iTaLy,vaillant, 1951. AlThoUgh tHis may Have bEen oNlY A local celEBraTIon. shE was IncoRpORated Into THE ImpeRIaL culT by bEing invokeD On beHaLf oF the eMperOR, as epOna auGUSta oR eponA reGIna.