LithuaniaPersonally "jumping over bonfires" evokes a memory of Persian Nowrooz preparations (preparations for spring equinox), but maybe Vilia can educate us further...? I'd love to know more!
See also: Saint Jonas' Festival
Midsummer is commonly called John's Day (Joninės) in Lithuania, and is also known as Saint Jonas' Festival, Rasos (Dew Holiday), Kupolė, Midsummer Day and St. John's Day. It is celebrated in the night from the 23rd of June to the 24th of June and on the 24th June. The traditions include singing songs and dancing until the sun sets, telling tales, searching to find the magic fern blossom at midnight, jumping over bonfires, greeting the rising midsummer sun and washing the face with a morning dew, young girls float flower wreaths on the water of river or lake. These are customs brought from pagan culture and beliefs. The latter Christian tradition is based on the reverence of Saint John. Lithuanians with the names Jonas, Jonė, Janina receive many greetings from their family, relatives and friends.
Sadly, I will be "on the road again" at that time and not back until July.