The Hartjesdagen is a yearly street party on Zeedijk, near the Nieuwmarkt. It appears to have existed in the Middle Ages too, and has been revived in recent years.
One of the most popular parts is the parade on Sunday, where men dress as women, and vice versa, but there are more events taking place.
In recent years, the Hartjesdagen has been a yearly event on the brink of financial collapse, but in 2015 it is happening!
Hartjesdagen Parade @ Zeedijk