Supporters and members wore red shirts, jumpsuits and the party’s trademark berets and gathered on the grass near a stage.
Young and old were dancing in circles as songs played on loud speakers.
People brought camping chairs, cooler boxes and blankets.
Economic Freedom Fighters leader Julius Malema was due to address the crowd shortly.
A red marquee tent had been set up next to the stage with white chairs and couches inside.
The party placed third in the 2014 general election, securing 6.35 percent of the vote with 1,169,259 votes.