According to a Finnish belief, Jaakko throws a cold stone on his name day (25th July) and the stone makes the waters cold again.
The Unscientific Society of Finland also throws the stone every year. I didn’t hear what was their theory behind the cooling this year but they were shouting cha cha cha.
Contact the author: ppblogs at welho.com
The images are not available for free and they may not be used without an agreement with the author.
Check my main blog What the Helsinki? and the related app too!