Putin was immersed in ice water three times. What is this ceremony to celebrate?

Epiphany (Greek epiphaneia) was originally a festival for the Eastern Church to celebrate the birth of Jesus. [1] In the context of ancient thoughts, the Greek original meaning of the word "Epiphaneia" is: a god appeared and was visible to the naked eye; Or an emperor worshipped as a god visits a city in his kingdom so that local residents can see him.

Orthodox Christians bathed in cold water to welcome Epiphany. According to traditional customs, Orthodox Christians will jump into cold water to "purify" their souls.