"Agood piece of advice: Beware of Easter Monday in Poland. Although this advice might seem strange, you really should take it to heart, cause otherwise… you’ll get soaked! The tradition of Śmigus-Dyngus is still going strong in Poland."
The festival is traditionally celebrated by boys throwing water over girls they like and spanking them with pussy willows. Boys would sneak into girls' homes at daybreak on Easter Monday and throw containers of water over them while they were still in bed.