France’s Gael Monfils serves on January 19, 2016, during his first-round match against Japan’s Yuichi Sugita at the Australian Open tennis tournament at Melbourne Park, Australia. Brandon Malone / Reuters
Models are silhouetted on January 19, 2016, during the Dsquared2 men’s Fall-Winter 2016-2017 show collection, part of Milan Fashion Week in Italy. Luca Bruno / Associated Press
About one hundred women performed in — 4C temperatures on January 17, 2016, in a performance for a yoga culture festival in Luoyang, Henan Province, China. Reuters
A Russian Orthodox believer bathes in icy water on Epiphany at the Church of the Holy Trinity in Moscow, Russia, on January 18, 2016. Water blessed by a cleric on that day is considered holy and pure until next year’s celebration. It is believed to have special powers of protection and healing. The Russian Orthodox church follows the old Julian calendar, which has Epiphany falling on January 19. Alexander Zemlianichenko Jr / Associated Press
Migrants walk through a frozen field on January 18, 2016, after crossing the border from Macedonia, near the village of Miratovac, Serbia. Marko Djurica / Reuters
A worker arranges lanterns at a factory on January 19, 2016, ahead of the upcoming Chinese Lunar New Year, in Boai county, Henan province, China. This is the year of the monkey according to the Chinese zodiac. China Daily / Reuters
A Swiss special-police officer stands on the roof of the Kongress Hotel next to the Congress Centre, on January 19, 2016, in preparation for the 46th World Economic Forum in Davos, Switzerland, which runs from January 20 to 23. The theme this year is Mastering the Fourth Industrial Revolution. Jean-Christophe Bott / EPA
Frontier soldiers attend a drill in — 37C temperatures on January 18, 2016, in Heihe, Heilongjiang province, China. ChinaFotoPress via Getty Images
Orthodox believers plunge into icy water on January 19, 2016, during the celebration of the Epiphany in Kiev, Ukraine. Thousands of Orthodox believers celebrate the holiday of the Epiphany on January 19, and traditionally plunge into holes cut through thick ice on rivers and ponds to cleanse themselves with water deemed holy for the day. Efrem Lukatsky / Associated Press