Russian Emergency Situations employees help a girl to bath in the icy water on Epiphany at the Church of the Holy Trinity in Ostankino near TV Tower in Moscow, Russia, Friday, January 18, 2019. Across Russia, the devout and the daring are observing the Orthodox Christian feast day of Epiphany by immersing themselves in frigid water through holes cut through the ice of lakes and rivers. Epiphany celebrates the revelation of Jesus Christ as the incarnation of God through his baptism in the River Jordan. (Photo by Alexander Zemlianichenko/AP Photo)

Ukrainian servicemen fire toward Russian troops with a tank at a position in Donetsk region, as Russia's attack on Ukraine continues, Ukraine on August 12, 2022. (Photo by Reuters/Stringer)

A Ukrainian service member smokes near a frontline, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on February 8, 2023. (Photo by Yevhenii Zavhorodnii/Reuters)

Military chaplain Yurii looks on in a trench after an Orthodox Easter service for Ukrainian servicemen at their position, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine on April 15, 2023. (Photo by Sofiia Gatilova/Reuters)

A man takes a dip inside a chapel during celebrations of the Orthodox Christian feast of Epiphany in Saint Petersburg, Russia on January 19, 2020. (Photo by Anton Vaganov/Reuters)

A diver in a pool at the Army 2021 International Military and Technical Forum, at the Patriot military park in Moscow Region, Russia on August 22, 2021. (Photo by Sergei Karpukhin/TASS/Alamy Live News)

Russia's Kamila Valieva performs during the Exhibition Gala at the Rostelecom Cup 2021 ISU Grand Prix of Figure Skating in Sochi on November 28, 2021. (Photo by Dimitar Dilkoff/AFP Photo)

Ukrainian artillery fires towards the frontline during heavy fighting amid Russia's attack on Ukraine, near Bakhmut, Ukraine on April 13, 2023. (Photo by Kai Pfaffenbach/Reuters)