Easter Monday, also known as Lany Poniedziałek, is a public holiday in Poland. It is a day after Easter Sunday and celebrates Jesus Christ's resurrection, according to Christian belief. However, in Poland, Easter Monday is tied more to folk traditions and pagan rituals than the religious aspect.

One of the major customs that define Easter Monday in Poland is the Smigus Dyngus, also known as Wet Monday. During this event, Poles engage in playful water fights where everyone, especially the ladies, are targets. The custom originates from the pre-Christian Slavic traditions celebrating the coming of spring, the water symbolizing purification and fertility.

On this day, Polish families enjoy special meals that consist of left-overs from Easter Sunday feast. Easter Monday is also a day for rest and relaxation for many Poles, who have, over the weekend, engaged in various Easter traditions like the Blessing of the Easter Baskets or participating in church services. Although it’s a day off work for many, it's still a day filled with joy and spending time with loved ones.