Quick answer
9 AM AEST is 7 PM EST the previous evening in New York in winter, or 6 PM EDT the previous evening in summer. Australian Eastern Standard Time (UTC+10) is 14-15 hours ahead of New York.
How to use this time conversion
The start of the Sydney working day lands in early evening New York time - workable for a brief end-of-day US call. A 6-7 PM New York / 9-10 AM AEST arrangement is common for US-Australia teams. During Australian summer (AEDT, UTC+11), the gap widens by 1 hour.
What is 9 AM AEST in New York?
9 AM AEST is 7 PM EST the previous evening in winter, or 6 PM EDT in summer. During Australian summer (AEDT, UTC+11), 9 AM AEDT is 6 PM EST or 5 PM EDT.
Why can the answer change?
The answer can change when one location observes daylight saving time and the other does not, or when they switch clocks on different dates.
What is a practical meeting time for New York and Sydney?
A 6-7 PM New York / 9-10 AM Sydney arrangement works for both sides with minimal adjustment. Alternatively, 9 AM Sydney / 6-7 PM New York the day before. Both cities observe DST on opposite schedules, so the gap changes through the year.
Can I compare this with more people?
Yes. Use the main Meeting Time Finder to add every participant and find the shared working-hours overlap.
Related timezone pages
sydney new york · london sydney · 9am aest in london · 9am gmt in tokyo