The Epiphany, celebrated in Russia on January 19, marks the baptism of Jesus in the Orthodox Church (ref. Wikipedia).
In St. Petersburg, one of the places for celebrating, is at the banks of Peter & Paul fortress. Hundreds of men and women stands in line for diving into to the freezing water of the Neva River. These pictures are during epiphany in 2014 and 2015.
This is Liudmila (86) who I also meet a week later. Then she was taking a bath as well, and her photos can be seen here: