Sydney operates on Australian Eastern Standard Time (AEST) during winter months, which is 10 hours ahead of Coordinated Universal Time (UTC+10). During daylight saving time, observed from the first Sunday in October to the first Sunday in April, Sydney switches to Australian Eastern Daylight Time (AEDT), which is UTC+11.
Sydney is Australia's largest city and a major financial hub for the Asia-Pacific region. When scheduling international calls, note that Sydney is 15-16 hours ahead of New York and 9-10 hours ahead of London, depending on daylight saving time in each location.
Sydney is home to the iconic Sydney Opera House and Harbour Bridge. The city hosted the 2000 Summer Olympics and is often one of the first major cities to celebrate New Year's Eve due to its timezone position. When it's midnight on New Year's in Sydney, it's still New Year's Eve morning in most of the world.