Sydney is 16 hours ahead of New York during Eastern Standard Time (when Sydney is in daylight saving). New York uses EST (UTC-5) while Sydney uses Australian Eastern Daylight Time (AEDT, UTC+11). When it's 12:00 PM in New York, it's 4:00 AM the next day in Sydney.
The time difference varies between 14-16 hours throughout the year as both cities observe DST but in opposite seasons.
Best calling time: 5:00 PM - 8:00 PM New York time. This corresponds to 9:00 AM - 12:00 PM in Sydney (timing varies with DST changes in both countries).
Sydney is Australia's largest city and financial center. Many US companies have Asia-Pacific headquarters there. The significant time difference requires careful scheduling. Direct flights take about 20 hours.