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
A child walks on numbers reading "2018" in Allahabad, India.