An enthusiast dressed as a zombie takes part in the annual Zombie Walk festival in Prague June 1, 2013. (Photo by David W. Cerny/Reuters)

Two sheep fight in a competition in Zhangjiakou, Hebei province, China on August 1, 2017. (Photo by Reuters/China Stringer Network)

Jakub Przygonski at the stage 1 of Dakar Rally, Pisco, Peru on January 7, 2019. (Photo by Kin Marcin/Red Bull Content Pool)

Miley Cyrus performs at the Radio 1 Big Weekend at Stewart Park on May 25, 2019 in Middlesbrough, England. (Photo by Jo Hale/Redferns)

A general view of the Drax Power Station, illuminated in the colours of the Ukrainian flag, in North Yorkshire, Britain on April 1, 2022. (Photo by Lee Smith/Reuters)

A cyclist rides past a tumulus tomb in Gyeongju, South Korea on November 1, 2025. (Photo by Anthony Wallace/AFP Photo)

Icelandic horses graze on a meadow at a stud farm in Wehrheim near Frankfurt, Germany, Monday, September 1, 2025. (Photo by Michael Probst/AP Photo)

The elephant cow Omysha dives under water in its enclosure at the Zoo in Zurich, Switzerland, Wednesday, February 3, 2021. (Photo by Alexandra Wey/Keystone via AP Photo)