A reveller walks through the streets in the early hours during traditional May Day celebrations in Oxford, Britain, May 1, 2015. (Photo by Dylan Martinez/Reuters)
Labourers work at the installation site of Liquefied Petroleum Gas (LPG) pipeline on May Day or Labour Day in Chandigarh, India, May 1, 2015. (Photo by Ajay Verma/Reuters)
Passengers check their mobile devices as a bin is full of garbage during a protest by the cleaning staff at Barcelona's airport, Spain, December 1, 2016. (Photo by Albert Gea/Reuters)
College students shout slogans during a pep rally organised to boost their morale ahead of their job hunting in Tokyo, Japan March 1, 2017. (Photo by Kim Kyung-Hoon/Reuters)
People dressed in swimsuits participate in the BoogelWoogel alpine carnival at the Rosa Khutor Alpine Resort in Krasnaya Polyana, Sochi, Russia on April 1, 2017. (Photo by Artur Lebedev/TASS)
Cardi B accepts the top rap song award for “I Like It” at the Billboard Music Awards on Wednesday, May 1, 2019, at the MGM Grand Garden Arena in Las Vegas. (Photo by Chris Pizzello/Invision/AP Photo)
A young man dressed as “La Llorona”, participates in a parade called “La Calabiuza” on the eve of the Day of the Dead in Tonacatepeque, El Salvador, November 1, 2019. (Photo by Jose Cabezas/Reuters)