Entertainer Larry Edwards participates in the 13th annual Las Vegas Great Santa Run in downtown Las Vegas, Nevada, U.S. December 2, 2017. More than 9,000 runners registered for the event, according to organizers. (Photo by Steve Marcus/Reuters/Las Vegas Sun)





A dog dressed in Santa Claus costume take part in the Santa Claus Run in Budapest, Hungary, December 3, 2017. (Photo by Laszlo Balogh/Reuters)





Charity runners dressed as Father Christmas participate in a “Santa Run” charity fun run in Stockholm on December 10, 2017. Hundreds of participants dressed in Santa suits and wearing white beards ran through the streets of the old town in Stockholm in an all charity run. (Photo by Jonathan Nackstrand/AFP Photo)





A charity runner dressed as Father Christmas poses as he participates in the “Santa Run” charity fun run in Stockholm on December 10, 2017. (Photo by Jonathan Nackstrand/AFP Photo)





Charity runners dressed as Father Christmas participate in the “Santa Run” charity fun run in Stockholm on December 10, 2017. (Photo by Jonathan Nackstrand/AFP Photo)





A charity runner dressed as Father Christmas poses as he participates in the “Santa Run” charity fun run in Stockholm on December 10, 2017. (Photo by Jonathan Nackstrand/AFP Photo)





A charity runner dressed as Father Christmas participates in the “Santa Run” charity fun run in Stockholm on December 10, 2017. (Photo by Jonathan Nackstrand/AFP Photo)





A charity runner dressed as Father Christmas steps out of a portable toilet ahead of the “Santa Run” charity fun run in Stockholm on December 10, 2017. Hundreds of participants dressed in Santa suits and wearing white beards ran through the streets of the old town in Stockholm in an all charity run. (Photo by Jonathan Nackstrand/AFP Photo)





A dog wears a Santa hat and scarf during the traditional Santa Claus run in Michendorf, eastern Germany, on December 10, 2017. (Photo by Ralf Hirschberger/AFP Photo/DPA)





Participants dressed in Father Christmas costumes take part in the traditional Santa Claus run in Michendorf, eastern Germany, on December 10, 201. (Photo by Ralf Hirschberger/AFP Photo/DPA)





Participants dressed in Father Christmas costumes take part in the traditional Santa Claus run in Michendorf, eastern Germany, on December 10, 2017. (Photo by Ralf Hirschberger/AFP Photo/DPA)





Participants dressed in Father Christmas costumes take part in the traditional Santa Claus run in Michendorf, eastern Germany, on December 10, 2017. (Photo by Ralf Hirschberger/AFP Photo/DPA)





Participants in the Stockholm Santa Run take a selfie at Kungstradgarden on December 10, 2017 in Stockholm, Sweden. The Stockholm Santa Run is an annual event where participants dress as Santa Claus and run or walk through a course in the city centre raising money for charity. (Photo by Michael Campanella/Getty Images)





Participants in the Stockholm Santa Run warming up at Kungstradgarden on December 10, 2017 in Stockholm, Sweden. (Photo by Michael Campanella/Getty Images)





People dressed as Santa Claus run through the streets of Michendorf, Germany December 10, 2017. (Photo by Axel Schmidt/Reuters)





People take part in a half naked Santa run in downtown Budapest, Hungary, December 10, 2017. (Photo by Bernadett Szabo/Reuters)





People take part in a half naked Santa run in downtown Budapest, Hungary, December 10, 2017. (Photo by Bernadett Szabo/Reuters)





People take part in a half naked Santa run in downtown Budapest, Hungary, December 10, 2017. (Photo by Bernadett Szabo/Reuters)





People take part in a half naked Santa run in downtown Budapest, Hungary, December 10, 2017. (Photo by Bernadett Szabo/Reuters)