The Ukrainian holiday linked to the summer solstice is Kupala Night.
Kupala Night, also called Ivan Kupala, is a major Slavic folk holiday associated with the summer solstice and the Nativity of Saint John the Baptist. In Ukraine, celebrations have been associated with the night of June 23–24 under the revised calendar adopted by many communities since 2023. In other Slavic regions, especially those retaining the Julian calendar for the observance, it is commonly celebrated on July 6–7.
Traditional customs include gathering herbs and flowers, floating wreaths on water, lighting bonfires, dancing, bathing, and jumping over flames. These practices combine Christian-calendar associations with older seasonal and possibly pre-Christian folk traditions.
The name is linked to a Proto-Slavic word meaning “to bathe,” fitting the holiday’s strong connection with rivers, lakes, water rites, and purification. Vertep, Malanka, and Maslenitsa are different Ukrainian or Slavic traditions, not names for this solstice-linked celebration.