Crowds of revelers in Asia have already welcomed the new year with noise, fireworks and, in some cases, tight security.
Australians were among the first to see the arrival of 2006. The city of Sydney celebrated with a spectacular pyrotechnic display and an enormous red heart attached to the city's Harbor Bridge.
In China, some six thousand people attended Beijing's annual New Year's concert, featuring British soprano Sarah Brightman among its celebrity performers.
Security is high in many places around the world, particularly Indonesia, where a bomb exploded in a crowded market in Central Sulawesi province earlier today (Saturday).
In Europe, extra police officers are patrolling the streets of Paris in case of a revival of the violent riots that plagued the city for weeks in October and November.
And in New York City, some streets and subway stations will be closed for security, as partiers pack Times Square to watch an illuminated crystal ball glide to the ground during the last few seconds of 2005.