Fireworks illuminate the sky during New Year's celebrations in San Francisco on January 1. Tayfun Coskun/Anadolu Agency/Getty Images

Fireworks are seen along the Las Vegas Strip on January 1. Richard Brian/AP

Fireworks explode over Copacabana beach in Rio de Janeiro on Monday, January 1, 2018. Leo Correa/AP

Confetti falls over the crowd as the clock strikes midnight at Times Square in New York. Go Nakamura/AP

Celebrations take place by the Petronas Twin Towers in Kuala Lumpur, Malaysia. Sadiq Asyraf/AP

Maasai tribe members perform a traditional dance on Nungwi Beach in Zanzibar, Tanzania. GULSHAN KHAN/AFP/Getty Images

Fireworks light up the sky over the London Eye in central London. John Stillwell/PA Images via Getty Images

Festivities take place by the Brandenburg Gate in Berlin. Adam Berry/Getty Images

Fireworks explode over the Kremlin in Moscow. Denis Tyrin/AP

People take photos during celebrations at the Kenyatta International Convention Centre in Nairobi, Kenya. YASUYOSHI CHIBA/AFP/Getty Images

Lights and fireworks are seen at the Arc de Triomphe on the Champs-Élysées in Paris. Thibault Camus/AP

Fireworks explode over downtown Beirut, Lebanon. Hussein Malla/AP

People in Kim Il Sung Square watch fireworks light the sky above the Taedong River in Pyongyang, North Korea. Jon Chol Jin/AP

The Parthenon temple is seen during New Year's celebrations in Athens, Greece. Yorgos Karahalis/AP

New Year's celebrations take place in Edinburgh, Scotland. Alex Hewitt/AP

Fireworks illuminate the sky in Baghdad, Iraq. Khalid Mohammed/AP

New Year's fireworks are seen above the Opera House and Harbour Bridge in Sydney, Australia. Over a million people gathered around the harbor to watch the 12-minute celebration for the start of 2018. James D. Morgan/Getty Images

Fireworks explode over Victoria Harbour during New Year celebrations in Hong Kong. DALE DE LA REY/AFP/Getty Images

Celebrations take place in Singapore's financial district. Wong Maye-E/AP

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

Tourist guides wearing 2018 New Year's glasses attend a celebration at Slender West Lake in Yangzhou, China, on Sunday, December 31, 2017. VCG/Visual China Group/Getty Images

A woman prays in front of lanterns to celebrate the New Year at Jogyesa Buddhist temple in Seoul, South Korea. Ahn Young-joon/AP

Swimmers take the plunge during the traditional San Silvestre Swim at La Comandancia beach in Tarragona, northeastern Spain. Jaume Sellart/EFE/Newscom

Performers parade through the streets as part of the annual Joburg Carnival in Johannesburg, South Africa. Many of the costumes are hand-made each year for the event. STR/EPA-EFE/REX/Shutterstock

Pope Francis kisses the Christ Child upon his arrival to preside over the Te Deum prayer in St, Peter's Basilica at the Vatican. VINCENZO PINTO/AFP/Getty Images