Children and young people participate in the Hanal Pixan festivities for the Day of the Dead in Merida, Yucatan, Mexico, 31 October 2018. The Xcaret group has been celebrating 'Almas de Plata' for the last 13 years, a festival of four days of life and death traditions. (Photo by Cuauhtemoc Moreno/EPA/EFE)





A participant in costume poses for a photo during a Halloween event at Happy Valley park in Beijing, China, October 31, 2018. (Photo by Jason Lee/Reuters)





A participant in costume and make-up poses for a photo during a Halloween parade at Walibi park in Wavre, Belgium, October 31, 2018. (Photo by Yves Herman/Reuters)





People in costume walk during Halloween celebration in La Paz, Bolivia on October 31, 2018. (Photo by David Mercado/Reuters)





A participant in costume eats before a Halloween event at Happy Valley park in Beijing, China, October 31, 2018. (Photo by Jason Lee/Reuters)





An Iraqi woman with zombie make-up is seen as she celebrates Halloween in Sulaimaniya, Iraq on October 31, 2018. (Photo by Ako Rasheed/Reuters)





People in costume participate in the 45th Annual Village Halloween Parade in Manhattan, New York on October 31, 2018. (Photo by Jeenah Moon/Reuters)





People in costume pose for a photograph during Halloween celebrations in La Paz, Bolivia on October 31, 2018. (Photo by David Mercado/Reuters)





A participant is pictured in front of a Ferris wheel during a Halloween event at an amusement park in Ulaanbaatar, Mongolia on October 31, 2018. (Photo by B. Rentsendorj/Reuters)





A woman takes a picture of people in costume during Halloween celebrations in La Paz, Bolivia on October 31, 2018. (Photo by David Mercado/Reuters)





A boy in costume walks during Halloween celebrations in La Paz, Bolivia on October 31, 2018. (Photo by David Mercado/Reuters)





A participant in costume and make-up poses for a photo during a Halloween parade at Walibi park in Wavre, Belgium, October 31, 2018. (Photo by Yves Herman/Reuters)





Iraqi men are seen in zombie make-up as they celebrate Halloween in Sulaimaniya, Iraq on October 31, 2018. (Photo by Ako Rasheed/Reuters)





A participant in costume and make-up poses for a photo during a Halloween parade at Walibi park in Wavre, Belgium, October 31, 2018. (Photo by Yves Herman/Reuters)





People in costume attend Halloween celebrations in La Paz, Bolivia on October 31, 2018. (Photo by David Mercado/Reuters)





Members of street performance troupe Macnas participate in their Halloween parade called “Out of the Wild Sky” in Galway, Ireland, October 28, 2018. (Photo by Clodagh Kilcoyne/Reuters)





Performers dance during a Day of the Dead parade in Juchitan, Mexico, Wednesday, October 31, 2018, the town where a caravan of thousands of Central American migrants are resting for a day as they make their way to the U.S. border. (Photo by Rodrigo Abd/AP Photo)





A participant in costume and make-up poses for a photo during a Halloween parade at Walibi park in Wavre, Belgium, October 31, 2018. (Photo by Yves Herman/Reuters)