Fireworks illuminate the sky during New Year's celebrations in San Francisco on January 1.
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.
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.
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.
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.
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.
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.
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.
Festivities take place by the Brandenburg Gate in Berlin.
Adam Berry/Getty Images
Fireworks explode over the Kremlin in Moscow.
Fireworks explode over the Kremlin in Moscow.
Denis Tyrin/AP
People take photos during celebrations at the Kenyatta International Convention Centre in Nairobi, Kenya.
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.
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.
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.
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.
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.
New Year's celebrations take place in Edinburgh, Scotland.
Alex Hewitt/AP
Fireworks illuminate the sky in Baghdad, Iraq.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
A child walks on numbers reading "2018" in Allahabad, India.
A child walks on numbers reading "2018" in Allahabad, India.
Prabhat VERMA/Newscom