People in folk costumes sing songs, and hold a symbol of the star of Bethlehem as they celebrate Orthodox Christmas in central Kiev, Ukraine, Tuesday, Jan. 7 2020. Orthodox Christians mark their traditional Christmas Day Jan. 7, with many symbolic events. (AP Photo/Efrem Lukatsky)

People wearing Ukrainian clothes sing Christmas carol during festivities marking Orthodox Christmas in Pirogovo village, not far from Ukrainian capital of Kiev on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian clothes sing Christmas carol during festivities marking Orthodox Christmas in Pirogovo village, not far from Ukrainian capital of Kiev on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian clothes sing Christmas carol during festivities marking Orthodox Christmas in Pirogovo village, not far from Kiev on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

A priest serves as people wearing Ukrainian clothes sing Christmas carol during festivities marking Orthodox Christmas in Pirogovo village, not far from Kiev on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian clothes sing Christmas carol during festivities marking Orthodox Christmas in Pirogovo village, not far from Kiev on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

Children wearing Ukrainian traditional clothes sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian traditional clothes sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

Children wearing Ukrainian traditional clothes sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

Children wearing Ukrainian traditional clothes dance as they sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

A dog looks at a decorative bull-calf during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian traditional clothes sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

People wearing Ukrainian traditional clothes sing Christmas carol during festivities marking the Orthodox Christmas in Pirogovo village, not far from Kiev, on January 7, 2020. - Orthodox believers mark Orthodox Christmas on January 7, according to the old Julian calendar. (Photo by Sergei SUPINSKY / AFP)

A picture taken on January 6, 2020 shows a woman helping a child use a penguin-shaped skating aid on an ice skating rink in Kiev during Orthodox Christmas Eve. - Orthodox believers mark Orthodox Christmas on January 7, according to the Julian calendar. (Photo by Sergei SUPINSKY / AFP)

A picture taken on January 6, 2020, shows a couple kissing on an ice skating rink in Kiev during Orthodox Christmas Eve. - Orthodox believers mark Orthodox Christmas on January 7, according to the Julian calendar. (Photo by Sergei SUPINSKY / AFP)

A picture taken on January 6, 2020, shows people skating around a christmas tree on an ice skating rink in Kiev during Orthodox Christmas Eve. - Orthodox believers mark Orthodox Christmas on January 7, according to the Julian calendar. (Photo by Sergei SUPINSKY / AFP)