New York has officially entered 2020 with the drop of the Times Square Ball.

London earlier rang in the New Year with a spectacular fireworks display.

It came after countries across the world marked the turning of the decade with lavish celebrations.

Hundreds of thousands of people watched a light and sound show on the Champs-Élysées in Paris.

Sydney ushered in 2020 with its spectacular harbour-front fireworks display, despite calls for the show to be cancelled due to bush fires across the country.

Tokyo, Pyongyang and Seoul saw in the New Year at 3pm UK time.

And the festive mood in Hong Kong and India was dampened by protests.

Hong Kong authorities cancelled the main midnight fireworks display for the first time in a decade, citing security concerns.

In the UK, London's show featured 12,000 fireworks, including 2,000 fired from the London Eye on the River Thames, and Big Ben chimed for the first time in a year amid renovation work.

Outlying American islands in the South Pacific, which are just east of the International Date Line, will be the last to welcome 2020 - at noon on Wednesday, exactly 25 hours after Samoa.

Follow our live blog for the latest video, photos and updates from celebrations around the world.