This is held annually at the time that is believed to be the date that Jesus was baptized. This event is held at Piraeus which is a port of Athens. The event starts with a priest flinging a crucifix into the water after which participants jump in to bring it back. The one who finds it is rewarded good luck for the coming year. Fishermen along with their boats also queue up to be blessed. 

More Festivals in Athens
Athens Biennial International Contemporary Art Exhibition
Athens Book Festival
Athens Carnival
Athens Fashion Week
Athens Festival
Athens International Film Festival