AEST to EST Converter

Which AEST and which EST?

Zone abbreviations are ambiguous, so this page starts by pinning both down. AEST here is Australian Eastern Standard Time: the IANA zone Australia/Sydney, anchored on Sydney. Note that AEST is also Eastern time as kept year-round in Brisbane, which does not observe DST; this page means only the Sydney sense. EST here is Eastern Standard Time (North America): America/New_York, anchored on New York. Note that EST is also Australian Eastern Standard Time (usually written AEST); this page means only the New York sense.

AEST in the everyday sense means Sydney time, whichever of AEST or AEDT (Australian Eastern Daylight Time) is in force. Sydney is not on AEST all year: its offset is UTC+10 while standard time applies (its July offset) and UTC+11 while daylight saving is active (its January offset). As of September 2026 it is on AEST (UTC+10). Wherever this page writes AEST, read it as "Sydney time on the date in question".

EST in the everyday sense means New York time, whichever of EST or EDT (Eastern Daylight Time) is in force. New York is not on EST all year: its offset is UTC−5 while standard time applies (its January offset) and UTC−4 while daylight saving is active (its July offset). As of September 2026 it is on EDT (UTC−4). Wherever this page writes EST, read it as "New York time on the date in question".

The difference as of September 2026

As of September 2026, New York is 14 hours behind Sydney. Sydney is on UTC+10 (AEST, daylight saving not in effect) and New York is on UTC−4 (EDT, daylight saving in effect). Subtract one offset from the other and you have the gap. As wall clocks: 9:00 AM in Sydney is 7:00 PM the previous day in New York, 5:00 PM in Sydney is 3:00 AM in New York, and 9:00 AM in New York is 11:00 PM in Sydney.

The calendar date is part of the conversion on this pair. A 9:00 AM to 5:00 PM day in Sydney reads 7:00 PM the previous day to 3:00 AM in New York, and a 9:00 AM to 5:00 PM day in New York reads 11:00 PM to 7:00 AM the next day in Sydney, so a time on one side can belong to a different date on the other. The converter above flags each reading that lands on the previous or next day; the date you enter is the date on the From side's clock.

Next scheduled clock changes: clocks in Sydney go forward 1 hour on Sunday, October 4, 2026 (local date), moving the offset from UTC+10 to UTC+11; clocks in New York go back 1 hour on Sunday, November 1, 2026 (local date), moving the offset from UTC−4 to UTC−5. Every one of those changes moves the gap, because the other side does not change with it.

How the gap changes through the year

Both sides of this pair observe daylight saving — Sydney moves between UTC+10 and UTC+11, New York between UTC−5 and UTC−4 — but they do not switch on the same dates. Sydney changes its clocks on its own calendar and New York on its own, and in the weeks between one side's switch and the other's, exactly one of them has moved. During those weeks the gap holds a value it holds only in those windows.

Sydney's daylight saving is inverted relative to New York's. Sydney is on UTC+11 in January and UTC+10 in July — its summer time is the one active around January — while New York is on UTC−5 in January and UTC−4 in July. Each side's summer time therefore falls in the other's winter, and the two are on summer time together only in the short stretches between one side's switch and the other's. That is why this pair takes three distinct values rather than two.

Over the year scanned from Sep 7, 2026, the gap takes three distinct values and changes four times. The full schedule, with dates on Sydney's calendar and each run's length in days:

* Cut short by the edge of the scanned year: this run began before the scan started or continues past its end.

The usual state — 183 of the 365 days scanned — has New York 14 hours behind Sydney. That is the value that holds for the largest part of the year. The briefest of the mismatch windows in the table is Mar 14, 2027 – Apr 4, 2027: 20 days at 15 hours behind, with AEDT / EDT in force. Counted by who is on summer time, the scanned year splits into 49 days with both sides on summer time (15 hours behind), 133 days with only Sydney on summer time (16 hours behind), and 183 days with only New York on summer time (14 hours behind). Every value other than the usual 14 hours behind falls inside those 182 days with both sides on summer time and with only Sydney on summer time.

The trap is the recurring meeting. Pin a weekly call at 9:00 AM on Sydney's clock and, on New York's calendar, it sits at 7:00 PM the previous day for most of the year but at 5:00 PM the previous day while the gap is 16 hours behind (AEDT / EST) and at 6:00 PM the previous day while the gap is 15 hours behind (AEDT / EDT). Pinned on New York's clock instead, the same call moves on Sydney's calendar: 9:00 AM there is 11:00 PM in Sydney for most of the year and 1:00 AM the next day at 16 hours behind and 12:00 AM the next day at 15 hours behind. Either way the meeting moves twice around each mismatch window — once when the first side switches and once when the second does — which is why the converter above evaluates the rules for the exact date rather than applying one remembered number.

Working hours that overlap

Assume a 9:00 AM to 5:00 PM day on both sides. Because the gap changes during the year, the overlap changes with it, so it is shown for each gap the pair takes:

• New York 16 hours behind Sydney (AEDT / EST; 133 of the 365 days scanned): no overlap at all: when it is 9:00 AM in New York it is already 1:00 AM the next day in Sydney.
• New York 15 hours behind Sydney (AEDT / EDT; 49 of the 365 days scanned): no overlap at all: when it is 9:00 AM in New York it is already 12:00 AM the next day in Sydney.
• New York 14 hours behind Sydney (AEST / EDT; 183 of the 365 days scanned): no overlap at all: when it is 9:00 AM in New York it is already 11:00 PM in Sydney.

The 9-to-5 window is a convention, not a fact about anyone's real hours. The Meeting Planner lets you set each side's actual working hours and shows the overlap for the exact date you are planning.

Converting EST to AEST

This page serves both directions, because the reverse conversion is the same gap with the sign flipped. As of September 2026, Sydney is 14 hours ahead of New York, so:

• 9:00 AM AEST (Sydney) = 7:00 PM the previous day EST (New York)
• 9:00 AM EST (New York) = 11:00 PM AEST (Sydney)
• 5:00 PM EST (New York) = 7:00 AM the next day AEST (Sydney)

To run EST to AEST in the converter above, swap the From and To menus; the result shows both offsets for the date you enter and flags a day change whenever the reading lands on the previous or next calendar day. The readings above hold only while the gap is 14 hours behind; on the dates listed in the section above they move, in both directions at once.

More on these zones

• Current time in Sydney — live clock, offset and next clock change.
• Current time in New York — live clock, offset and next clock change.
• Time Zone Converter — any city to any city, DST-correct for the date.
• Meeting Planner — overlap for your real working hours.
• All zone-to-zone converters — the other corridors on this site.

AEST to EST — frequently asked questions

Conversions are computed locally in your browser from its IANA time zone data; nothing you enter is transmitted. The schedule and offsets on this page were derived from the same database at build time, as of September 2026. Jurisdictions occasionally change DST law with short notice, and the IANA database follows reality — for legally critical timing, confirm against an official source. See the methodology page.