A couple have their photo taken by a surf lifeguard at Bondi Beach on Christmas day in Sydney, Australia on December 25, 2017. Dean Lewins / AP
A woman looks at religious lockets at a stall outside a church during the Christmas celebrations in Chandigarh, India, on December 25, 2017. Ajay Verma / Reuters
Pope Francis leads the Christmas night Mass in Saint Peter's Basilica at the Vatican on December 24, 2017. Tony Gentile / Reuters
A priest attends Christmas Mass at Saint Antuan Church in the Beyoglu district of Istanbul on December 24, 2017. Yasin Akgul / AFP
US president Donald Trump participates in NORAD Santa Tracker phone calls at the Mar-a-Lago resort in Palm Beach, Florida on December 24, 2017. Nicholas Kamm / AFP
A surfer wearing a Christmas hat rides a wave on his surfboard on Christmas Day at Sydney's Bondi Beach in Australia on December 25, 2017. David Gray / Reuters
Children hold candles at mass prayer during Christmas Eve at a church in Ambon, Indonesia, on December 24, 2017. Antara Foto / Reuters
This photo, taken on December 24, 2017, shows a participant taking a video as a choir sings hymns during a Christmas Eve mass at a church in Fuyang in China's eastern Anhui province. AFP
A man dressed in a Santa Claus outfit waves to people from a fisherman's boat on Christmas Eve along the coast of Valparaiso, Chile, on December 24, 2017. Rodrigo Garrido / Reuters
A surfer walks past a Christmas tree at Bondi Beach on Christmas Day in Sydney, Australia on December 25, 2017. Dean Lewins / AP
A couple have their photo taken by a surf lifeguard at Bondi Beach on Christmas day in Sydney, Australia on December 25, 2017. Dean Lewins / AP
A woman looks at religious lockets at a stall outside a church during the Christmas celebrations in Chandigarh, India, on December 25, 2017. Ajay Verma / Reuters
Pope Francis leads the Christmas night Mass in Saint Peter's Basilica at the Vatican on December 24, 2017. Tony Gentile / Reuters
A priest attends Christmas Mass at Saint Antuan Church in the Beyoglu district of Istanbul on December 24, 2017. Yasin Akgul / AFP
US president Donald Trump participates in NORAD Santa Tracker phone calls at the Mar-a-Lago resort in Palm Beach, Florida on December 24, 2017. Nicholas Kamm / AFP
A surfer wearing a Christmas hat rides a wave on his surfboard on Christmas Day at Sydney's Bondi Beach in Australia on December 25, 2017. David Gray / Reuters
Children hold candles at mass prayer during Christmas Eve at a church in Ambon, Indonesia, on December 24, 2017. Antara Foto / Reuters
This photo, taken on December 24, 2017, shows a participant taking a video as a choir sings hymns during a Christmas Eve mass at a church in Fuyang in China's eastern Anhui province. AFP
A man dressed in a Santa Claus outfit waves to people from a fisherman's boat on Christmas Eve along the coast of Valparaiso, Chile, on December 24, 2017. Rodrigo Garrido / Reuters
A surfer walks past a Christmas tree at Bondi Beach on Christmas Day in Sydney, Australia on December 25, 2017. Dean Lewins / AP
A couple have their photo taken by a surf lifeguard at Bondi Beach on Christmas day in Sydney, Australia on December 25, 2017. Dean Lewins / AP