In Swedish Midsummer tradition, Midsummer Eve is always celebrated on a Friday.
The date is not fixed to one calendar day. Sweden observes Midsummer Day on the Saturday falling between June 20 and June 26, so Midsummer Eve falls on the preceding Friday, between June 19 and June 25. The Friday celebration is generally the main social event.
Swedish Midsummer is one of the country’s most important annual festivities, rivaling Christmas in popularity. Celebrations commonly feature a flower-decorated midsummer pole, circle dancing, singing, pickled herring, new potatoes, strawberries, sour cream and schnapps. Many people leave cities for countryside homes or coastal gatherings.
A common mix-up is confusing Sweden’s movable Midsummer date with the traditional June 24 feast of Saint John the Baptist. Sweden’s modern public-holiday arrangement deliberately places the observance on a Friday-Saturday weekend, while other countries retain fixed or differently calculated dates.