Sydney and Australian Eastern Time — Convert to US Time Zones
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Sydney, Australia operates on Australian Eastern Standard Time (AEST, UTC+10) from April to October, and Australian Eastern Daylight Time (AEDT, UTC+11) from October to April. The flip compared to the Northern Hemisphere is intentional — Australia's summer is December through February, so DST runs during opposite months from the US.
Sydney is 15 to 16 hours ahead of US Eastern depending on the season, and 18 to 19 hours ahead of US Pacific. Use the free time zone converter to convert any time instantly, accounting for both countries' DST schedules automatically.
AEST and AEDT Explained
| Season | Time Zone | UTC Offset | Period |
|---|---|---|---|
| Australian winter | AEST | UTC+10 | April – October |
| Australian summer | AEDT | UTC+11 | October – April |
Because Australia's summer (AEDT) overlaps with US winter (EST) — and vice versa — the gap between Sydney and New York actually varies from 15 to 17 hours across the year as both countries' DST schedules interact. The timezone converter calculates the live difference automatically.
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| Sydney Time | US Eastern (approx.) | US Pacific (approx.) |
|---|---|---|
| 9 AM Sydney | 6–7 PM ET (previous day) | 3–4 PM PT (previous day) |
| 12 PM Sydney | 9–10 PM ET (previous day) | 6–7 PM PT (previous day) |
| 5 PM Sydney | 2–3 AM ET | 11 PM – 12 AM PT (previous day) |
| 9 PM Sydney | 6–7 AM ET | 3–4 AM PT |
The approximate ranges above account for seasonal DST variation. Use the converter for exact times.
Best US-Australia Meeting Windows
For US East Coast and Sydney: the most practical window is 7–9 AM ET (corresponding to 10 PM – 12 AM AEDT in Sydney's summer, or 9–11 PM AEST in winter). This means Sydney is taking an evening/late night call, while the US team is starting their morning.
For US West Coast and Sydney: 5–7 PM PT (previous day) = 9–11 AM Sydney. This is actually decent — Sydney is mid-morning and the US West Coast is end-of-day. This is the standard window for US-Australia teams with significant West Coast presence.
Like most Asia-Pacific time zone pairs, US-Australia teams with high meeting frequency often use async video updates rather than trying to find a live window that suits everyone every week.
Convert Sydney and Australian Times to US Zones
Enter any Sydney or Australian time and see it in Eastern, Pacific, and other US zones — free, DST-accurate.
Open Time Zone ConverterFrequently Asked Questions
Is Sydney time the same as Australian Eastern time?
Yes. Sydney, Melbourne, Brisbane (in summer only), and Canberra all use Australian Eastern time (AEST/AEDT). Note: Brisbane does not observe DST, so it stays on AEST year-round.
How many hours is Sydney ahead of New York?
Between 15 and 17 hours depending on the season, due to both the US and Australia observing DST on opposite schedules. Use the converter for the current live difference.
What is AEST vs AEDT?
AEST (Australian Eastern Standard Time, UTC+10) runs from April to October during Australian autumn/winter. AEDT (Australian Eastern Daylight Time, UTC+11) runs from October to April during Australian spring/summer.