Night Of Ivan Kupala. Belarus, Russia, Ukraine

There is an ancient Kupala belief, that the eve of Ivan Kupala is the only time of the year when ferns bloom. Prosperity, luck, discernment and power would befall on whoever finds a fern flower. Therefore, on that night village folks would roam through the forests in search of magical herbs and especially the elusive fern flower.
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.
It is to be noted that biologists have held the persistent scientific fact that ferns have never and will never bloom.
In Gogol's story The Eve of Ivan Kupala a young man finds the fabulous fern-flower but is cursed by it. Gogol's witches' sabbath on the Eve of Ivan Kupala inspired Modest Mussorgsky to compose his Night on Bald Mountain.