Using London time, this is when the world will welcome in 2018:

• Sun 15:00              Japan & South Korea

• Sun 16:00              China

• Sun 17:30              Myanmar and Cocos Islands
• Sun 18:15              Nepal
• Sun 18:30              India and Sri Lanka
• Sun 21:00              Moscow/Russia
• Mon 00:00             United Kingdom

• Mon 02-3:00         Brazil
• Mon 03:30-8:00   USA, Canada
• Mon 12:00             US outlying islands (Baker Island, Howland Island etc)