Śmigus-Dyngus

Śmigus-dyngus () or lany poniedziałek () is a celebration held on Easter Monday across Central Europe, and in small parts of Eastern and Southern Europe. The Eastertide tradition is widely associated with Poland in English-speaking countries and is observed by Polish diaspora communities, particularly among Polish Americans who call it Dyngus Day. Customs surrounding Śmigus-dyngus celebrate the arrival of Christianity in Poland. A similar tradition also exists among Hungarians, the Easter sprinkling called (sprinkling) and in Slovakia, called oblievačka (the pouring).

On Śmigus-dyngus, Polish families traditionally visit or call relatives, gifting them Paschal eggs. Mass is well attended by Christians on Śmigus-dyngus. Traditionally, boys throw water over girls on Easter Monday. This is symbolic of the "cleansing of one from sins and marking the end of Lent with a day of feasting and merrymaking". The custom may derive from a commemoration of the Baptism of Poland, when the Polish people became Christians and received baptism en masse. Additionally, certain scholars trace the custom to Jerusalem, in which water was used to disperse crowds who were gathering to discuss the resurrection of Jesus.