People planning to travel by sea on Sunday May 1 are expected to face problems since dockworkers will be holding a 24-hour strike and work stoppage for the May Day Labour celebration. Unions have decided to participate with a 24-hour strike from 12 midnight on Saturday until 12 midnight on Sunday. The dockworkers are expected to hold an initial strike gathering in Karaiskaki Square in Piraeus at 5:30 in the morning.