MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6: People attend the Orthodox Christmas mass as Russian Orthodox Christians observe Christmas in accordance with the Julian calendar, at the Cathedral of Christ the Saviour, Moscow, Russia on December 06, 2020. Patriarch Kirill of Moscow led the ceremony as it was held with limited number of participant due to coronavirus (Covid-19) pandemic. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill (3rd R) of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill (3rd R) of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill (C) of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill (C) of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia crosses himself during a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

MOSCOW, RUSSIA - JANUARY 6 : Patriarch Kirill (C) of Moscow and All Russia conducts a Christmas liturgy at the Cathedral of Christ the Saviour in Moscow, Russia on January 06, 2021. Russian Orthodox Christians observe Christmas in accordance with the Julian calendar. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM

Nuns, wearing face masks to protect against coronavirus and observed social distancing guidelines, cross themselves as they attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, Thursday, Jan. 7, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko), APTOPIX

Nuns, wearing face masks to protect against coronavirus and observed social distancing guidelines, cross themselves as they attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, Thursday, Jan. 7, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill, center, delivers the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill, right, serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines cross themselves as they attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines cross themselves as they attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

A woman wearing a face mask to protect against coronavirus, observed social distancing guidelines lights a candle prior to the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

A woman wearing a face mask to protect against coronavirus, waits to attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian Orthodox Patriarch Kirill serves the Christmas Mass as parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines attend the service in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Parishioners wearing face masks to protect against coronavirus, observed social distancing guidelines as they attended the the Mass. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Parishioners wearing face masks to protect against coronavirus, talk to each other as they wait to attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, late Wednesday, Jan. 6, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

A boy and other parishioners wearing face masks to protect against coronavirus, attend the Christmas Mass in the Christ the Saviour Cathedral in Moscow, Russia, early Thursday, Jan. 7, 2021. Orthodox Christians celebrate Christmas on Jan. 7, in accordance with the Julian calendar. (AP Photo/Alexander Zemlianichenko)

Russian National Guard (Rosgvardia) servicemen block the way to the Cathedral of Christ the Saviour late on January 6, 2021, as the entrance to the Orthodox Christmas services is restricted due to the Covid-19 pandemic. - 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 Alexander NEMENOV / AFP)

Russian National Guard (Rosgvardia) serviceman blocks the way to the Cathedral of Christ the Saviour late on January 6, 2021, as the entrance to the Orthodox Christmas services is restricted due to the Covid-19 pandemic. - 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 Alexander NEMENOV / AFP)

A woman talks to Russian National Guard (Rosgvardia) servicemen blocking the way to the Cathedral of Christ the Saviour late on January 6, 2021, as the entrance to the Orthodox Christmas services is restricted due to the Covid-19 pandemic. - 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 Alexander NEMENOV / AFP)

A woman wearing a face mask lights a candle during an Orthodox Christmas service in a church in western Moscow on January 6, 2021, amid the Covid-19 pandemic caused by the novel coronavirus. - 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 Alexander NEMENOV / AFP)

Faithfuls wearing face masks attend an Orthodox Christmas service in a church in western Moscow on January 6, 2021, amid the Covid-19 pandemic caused by the novel coronavirus. - 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 Alexander NEMENOV / AFP)

Faithfuls wearing face masks attend an Orthodox Christmas service in a church in western Moscow on January 6, 2021, amid the Covid-19 pandemic caused by the novel coronavirus. - 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 Alexander NEMENOV / AFP)

Faithfuls wearing face masks attend an Orthodox Christmas service in a church in western Moscow on January 6, 2021, amid the Covid-19 pandemic caused by the novel coronavirus. - 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 Alexander NEMENOV / AFP)

A man walks past an Orthodox Church to attend a Christmas service in western Moscow on January 6, 2021, amid the Covid-19 pandemic. - 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 Alexander NEMENOV / AFP)