Ivan Kupala Day (Feast of St. John the Baptist) is celebrated in Poland, Russia, Belarus and Ukraine currently on 7 July. Calendar-wise, it is opposite to the winter solstice holiday Korochun. Some early mythology scholars, such as Sir James Frazer, claimed that the holiday was originally Kupala a pagan fertility rite later accepted into the Orthodox Christian calendar.
Many of the rites related to this holiday within Slavic religious beliefs, due to the ancient Kupala rites, are connected with the role of water in fertility and ritual purification. Youths would jump over the flames of bonfires. Girls would float wreaths of flowers often lit with candles on rivers and would attempt to gain foresight into their relationship fortunes from the flow patterns of the flowers on the river. Men may attempt to capture the wreaths, in the hope of capturing the interest of the woman who floated the wreath.
Traditionally, unmarried women, signified by their garlands on their hair, would be the first to enter the forests. They are followed by young men. Therefore, consequent to the quest in finding herbs and the fern flower may be the blooming of relationships between pairs of men and women within the forest. That is one of the most romantic nights in Ukraine.
Some of the ladies on HotRussianBrides.com have invited their suitors to symbolically participate in this tradition with letters like the following:
“…That is one of the most romantic night in Ukraine. Pity you haven'tbeen here on that night cause if you had been you would have a uniquechance to see lots of beautiful single girls standing on the banks ofrivers with candles lit and throwing flower wreathes onto the water.Believe me that is an incredible view to see when a girl does this sheasks God to let her only intended to see it and take it out of thewater - if it happens and he will find her, they will be togetherforever.
Writing this letter to you I am throwing my wreath onto the water - itis colorful, made of my dreams of you, warmed with my heart and mytender hands...Once you see it don't go pass it cause it is intendedfor you only.”
Information from: http://en.wikipedia.org/wiki/Ivan_Kupala_Day