On Jan 19, church members gather for submerging themselves in icy rivers, ponds, or lakes / REUTERS
He warns diving amid freezing air temperatures requires preparations.
Kyiv Mayor Vitaliy Klitschko has submerged himself in freezing water of an ice hole near Kyiv's Druzhby Narodiv Park as part of an Epiphany ritual observed by Orthodox Christians on January 19.
He shared a respective video on Facebook.
Read alsoOrthodox Christians mark Epiphany with freezing plunges – media
The air temperature was minus 19 degrees Celsius (66.2°F) at that moment.
"I'm abiding by the rituals and in the morning I plunged into the ice hole. This time it was near Druzhby Narodiv Park. But remember: It is better not to dive amid severe frosts when the body isn't prepared. Happy Epiphany! Take care of yourself!" he wrote.