“Bocuk [Witch] Night” is celebrated in a village in Edirne, on the Greece-Turkey border. News in Turkish in BBC Türkçe

The “bocuk” is a term in Thrace that represents your toughest night. According to the belief, if the waters are frozen that night, there will be abundance in nature…

In the village coffeehouse at the Bocuk Night. 

A wikipedia entry in Turkish