Wianki is a Midsummer Polish tradition with roots in pre-Christianity. “Wianki” means “wreaths” in English. This holiday is named after the tradition of floating handmade wreaths down the river as a part of a pagan summer solstice custom. The most famous Wianki celebrations happen in Krakow, but Wianki is recognized throughout Poland.
: https://www.tripsavvy.com/wianki-midsummer-solstice-festival-1501922

