Saint John's Eve and the first day of the Midsummer celebrations (although this is not the real summer solstice; see June 20) (Roman Catholic Church, Europe): Jaaniõhtu (Estonia)

Jaanipäev and jaaniõhtu, also jaanilaupäev are the most important days in the Estonian calendar. The short summer seasons with long days and brief nights hold special significance for the people of Estonia. Jaanipäev is celebrated on the night between June 23 and 24, the Western Christian feast of the nativity of Saint John the Baptist, which is a few days after the summer solstice.

Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Russia. The territory of Estonia consists of the mainland, the larger islands of Saaremaa and Hiiumaa, and over 2,300 other islands and islets on the east coast of the Baltic Sea. Its capital Tallinn and Tartu are the two largest urban areas. The Estonian language is the official language and the first language of the majority of its population of nearly 1.4 million. Estonia is one of the least populous members of the European Union and NATO.