From spectacular fireworks in Hong Kong and Australia to a huge LED light show at the world's tallest building in Dubai, here is a look at how revellers around the world have welcomed in 2018:

Thousands of revellers are dancing on Copacabana beach to celebrate Rio de Janeiro's annual gay pride parade.

In the first electoral test for President Luiz Inacio Lula da Silva and his plans to remake Latin America’s largest country, Brazilians today chose mayors and city councils nationwide.