Russian President Vladimir Putin, left, leaves the Saint Nikolai on Lipno Church on an island in the river delta near Veliky Novgorod, about 500 kilometers (300 miles) northwest of Moscow, on a hovercraft after attending a Orthodox Christmas Mass, Russia, early Thursday, Jan. 7, 2021. Putin attended Orthodox Christmas services at the small 13th century island church continuing his normal routine by marking Christmas outside Moscow, often at relatively little-known provincial churches. The Russian Orthodox Church, like many other Orthodox churches, observes Christmas on Jan. 7, with main services starting late on Christmas Eve. (Mikhail Klimentyev, Sputnik, Kremlin Pool Photo via AP)

Russian President Vladimir Putin looks on as he leaves the Orthodox Christmas mass at the Saint Nikolai Church on Lipno Island in the Msta River delta, outside Veliky Novgorod, on January 7, 2021. - Orthodox Christians celebrate Christmas on January 7 in the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 17th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by Mikhail KLIMENTYEV / SPUTNIK / AFP)

Russian President Vladimir Putin, fourth left, attends the Orthodox Christmas Mass at the Saint Nikolai Church on Lipno Island in the Msta River, outside Veliky Novgorod, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP)

Russian President Vladimir Putin speaks to the media after attending the Orthodox Christmas Mass at the Saint Nikolai Church on Lipno Island in the Msta River, outside Veliky Novgorod, Russia, Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP)

The Saint Nikolai on Lipno Church is seen on an island in the river delta near Veliky Novgorod, about 500 kilometers (300 miles) northwest of Moscow, Russia, late Wednesday, Jan. 6, 2021. Russian President Vladimir Putin attended Orthodox Christmas services at the small 13th century island church continuing his normal routine by marking Christmas outside Moscow, often at relatively little-known provincial churches. The Russian Orthodox Church, like many other Orthodox churches, observes Christmas on Jan. 7, with main services starting late on Christmas Eve. (Alexei Babushkin, Sputnik, Kremlin Pool Photo via AP)

Russian President Vladimir Putin, center, attends the Orthodox Christmas mass at the Saint Nikolai Church on Lipno Island in the Msta River, outside Veliky Novgorod, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP)

Russian President Vladimir Putin, third left, attends the Orthodox Christmas mass at the Saint Nikolai Church on Lipno Island in the Msta River, outside Veliky Novgorod, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP)

Russian President Vladimir Putin attends the Orthodox Christmas mass at Saint Nikolai Church on Lipno Island in the Msta River delta, outside Veliky Novgorod, on January 7, 2021. - Orthodox Christians celebrate Christmas on January 7 in the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 17th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by Mikhail KLIMENTYEV / SPUTNIK / AFP)

Russian President Vladimir Putin attends the Orthodox Christmas mass at Saint Nikolai Church on Lipno Island in the Msta River delta, outside Veliky Novgorod, on January 7, 2021. - Orthodox Christians celebrate Christmas on January 7 in the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 17th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by Mikhail KLIMENTYEV / SPUTNIK / AFP)

Russian President Vladimir Putin attends the Orthodox Christmas mass at Saint Nikolai Church on Lipno Island in the Msta River delta, outside Veliky Novgorod, on January 7, 2021. - Orthodox Christians celebrate Christmas on January 7 in the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 17th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by Mikhail KLIMENTYEV / SPUTNIK / AFP)