People celebrate 2017 as confetti flies over Times Square in New York City on Sunday, January 1. Mary Altaffer/AP

People watch fireworks explode over Copacabana Beach during celebrations in Rio de Janeiro, Brazil. Leo Correa/AP

People watch a light show by the Giza Pyramids and Sphinx in Egypt. Amr Nabil/AP

Fireworks light up the sky above Funchal Bay on Madeira Island. Octavio Passos/Getty Images

People watch as fireworks explode over the Kremlin in Moscow, Russia. Alexander Zemlianichenko Jr./AP

Fireworks are lit near the London Eye just after midnight in London, England. Jack Taylor/Getty Images

Fireworks illuminate the night sky over Cologne Cathedral and the Rhine River during New Year's Eve celebrations in Cologne, Germany. Rex Features/AP

Fireworks explode at Burj Khalifa, the world's tallest building, in Dubai, United Arab Emirates. Jon Gambrell/AP

The Arc de Triomphe in Paris, France, is illuminated by a laser and 3D mapping display reading "Bonne Année" ("Happy New Year"). LIONEL BONAVENTURE/AFP/Getty Images

An Iraqi girl who fled the violence in Mosul, Iraq, poses with a mask on New Year's Eve at the Hasansham camp in northern Iraq. SAFIN HAMED/AFP/Getty Images

Fireworks illuminate the sky near the Petronas Twin Towers in Kuala Lumpur, Malaysia. MOHD RASFAN/AFP/Getty Images

Fireworks explode above Singapore's financial district at the stroke of midnight. Wong Maye-E/AP

North Koreans watch a fireworks display at the Kim Il Sung Square in Pyongyang, North Korea. Kim Kwang Hyon/AP

Fireworks illuminate the city's skyline during a New Year's Eve celebration in Yogyakarta, Indonesia. Ulet Ifansasti/Getty Images

Swimmers plunge into the cold water for the traditional New Year's Eve swim in Moossee, a lake in Moosseedorf, Switzerland. Peter Klaunzer/AP

A couple holds balloons containing their wishes for the new year during celebrations at Prince Park Tower in Tokyo, Japan. BEHROUZ MEHRI/AFP/Getty Images

A woman writes "2017" using a sparkler during New Year's Eve celebrations in Nyiregyhaza, Hungary. ATTILA BALAZS/MTI/EPA

Pope Francis kisses a statue of an infant Jesus during a New Year's Eve vespers mass in St. Peter's Basilica at the Vatican. Andrew Medichini/AP

Sri Lankan Buddhist devotees carry various offerings at a temple on New Year's Eve in Colombo, Sri Lanka. Eranga Jayawardena/AP

The night sky turns to red over the Hong Kong skyline. Lam Yik Fei/Getty Images

People gather in central Vladivostok as Russia's Pacific coast celebrates the arrival of the new year. Smityuk Yuri/TASS/ZUMA

Fireworks explode over the Sydney Harbour Bridge and the Sydney Opera House as the arrival of 2017 is celebrated in Australia. Brett Hemmings\Getty Images

The Sky Tower is seen among fireworks during New Year's Eve celebrations in Auckland, New Zealand. Dave Rowland/Getty Images