Secondary school graduates play in a fountain as they celebrate the last day of school, traditionally called the “last bell” in central Kiev, Ukraine on May 31, 2019. (Photo by Valentyn Ogirenko/Reuters)

Attendees walk on the illuminated runway following Alexander Wang's “AW Collection 1” presentation at the Rockefeller Center in New York, U.S., May 31, 2019. (Photo by /Andrew Kelly/Reuters)

Brazilian model and television personality Alessandra Ambrosio attends Alessandra Ambrosio And Darren Dzienciol's Horror In The Hills on October 31, 2019 in Beverly Hills, California. (Photo by Rochelle Brodin/Getty Images)

An Indian man feeds peanuts to monkeys along a busy street in Ahmedabad on July 31, 2016. Feeding animals is sacred in Hindu society. (Photo by Sam Panthaky/AFP Photo)

Valentin Arias Delgado and Diana Franco Durango, from Colombia, perform their routine at the Stage style Tango World Championship, in Buenos Aires, Argentina, August 31, 2016. (Photo by Enrique Marcarian/Reuters)

David Nicholson, 21, surfs as "The Mask" during the ZJ Boarding House Haunted Heats Halloween Surf Contest in Santa Monica, California, United States, October 31, 2015. (Photo by Lucy Nicholson/Reuters)

Balinese girls in traditional costumes gather during a parade for this year's last sundown in Bali island, Indonesia Thursday, December 31, 2015. (Photo by Firdia Lisnawati/AP Photo)

A balloon depicting the face of alien movie character E.T. is seen in the sky at the 15th Solar Balloon Festival in Envigado, Colombia December 31, 2015. (Photo by Fredy Builes/Reuters)