 Every five years the city organises DelfSail, the second-largest sailing event of the Netherlands after SAIL Amsterdam.Part of the sea harbor near the center of Delfzijl is open to public on Sundays and special events when the heavy machinery is not moving and the sea gates are not closed.Annually the "Pinksterfeesten" (Whitsunfestivities or Pentecost Festival) are organised in the city.