EST to Sydney
+15hEST
ESTSOURCESydney
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
EST and AEST on the World Map
The map below highlights the EST (Eastern Standard Time) and AEST (Australian Eastern Standard Time) timezone regions across the globe.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
About Sydney
WikipediaSydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
Sydney is one of the first major cities to welcome the New Year.
Understanding the +15h Gap: EST vs Sydney
EST runs on Eastern Standard Time (EST) at UTC-05:00. Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts EST 15 hours ahead of Sydney — a difference of +15h at the current offsets.
In practice, when it is 9:00 AM in EST it is 12:00 AM in Sydney on the next day. Midnight in EST is 3:00 PM in Sydney. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EST to Sydney time conversion table
| EST (EST) | Sydney (AEST) | Day |
|---|---|---|
| 12:00 AM | 3:00 PM | same day |
| 6:00 AM | 9:00 PM | same day |
| 7:00 AM | 10:00 PM | same day |
| 8:00 AM | 11:00 PM | same day |
| 9:00 AM | 12:00 AM | next day |
| 12:00 PM | 3:00 AM | next day |
| 3:00 PM | 6:00 AM | next day |
| 5:00 PM | 8:00 AM | next day |
| 6:00 PM | 9:00 AM | next day |
| 9:00 PM | 12:00 PM | next day |
Why people convert EST to Sydney time
- Scheduling a call from EST to Sydney: a 10:00 AM start in EST lands at 1:00 AM in Sydney the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +15h gap: EST and Sydney have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Sydney is 12:00 AM in EST.
- Watching a live event or market open: EST viewers need 12:00 AM in Sydney to catch a 9:00 AM start there, and 9:00 AM if the event is anchored to EST.
- Always state the zone abbreviation, not just the hour. "3:00 PM EST" is unambiguous; "3 PM" across a +15h gap is not.
- With a +15h gap there is no shared 9-to-5 window, so alternate the early start: one week EST takes the early slot, the next week Sydney does.
- Sydney: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.
About EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
About AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best time to call between EST and Sydney
With a +15h offset there is no overlap inside a normal 9 AM – 5 PM day. Sydney opens at 9:00 AM AEST, which is 12:00 AM in EST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
EST and Sydney have no shared working hours because of the +15h gap. Teams need to alternate early starts or rely on asynchronous handovers.
EST is 15 hours ahead of Sydney (EST UTC-05:00 → AEST UTC+10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
EST
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Sydney
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between EST and Sydney?
EST (EST, UTC-05:00) is 15 hours ahead of Sydney (AEST, UTC+10:00). The gap is currently +15h.
How do I convert EST time to Sydney time?
Add +15h to EST local time. For example, 9:00 AM in EST is 12:00 AM in Sydney (next day).
What time is it in Sydney right now?
Sydney uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +15h offset from EST.
What is the best time to call Sydney from EST?
There is no shared working-hours window because of the +15h gap. The closest option is 1:00 PM in EST, which is 4:00 AM in Sydney.
Which is ahead, EST or Sydney?
EST is 15 hours ahead of Sydney. When it is 12:00 PM in EST it is 3:00 AM in Sydney.
Do EST and Sydney use different time zones?
EST uses EST at UTC-05:00, while Sydney (Australia) uses AEST at UTC+10:00. The IANA identifiers are America/New_York and Australia/Sydney.
Does daylight saving time affect the EST–Sydney difference?
Neither zone observes daylight saving time, so the +15h offset between EST and Sydney is fixed all year.
Which other cities share EST's time zone?
EST also covers New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal and 8 more.
Which countries use EST, EST's zone?
EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, Haiti, Bahamas and 4 more.
Is there a day difference between EST and Sydney?
Sometimes. The +15h gap is large enough that 8:00 PM or later in EST already falls on the next day in Sydney.
What is the time difference between EST and Sydney?
Sydney is +15h from EST.
What timezone is EST in?
EST operates on its local timezone.
What timezone is Sydney in?
Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
What are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
Which countries use EST (Eastern Standard Time)?
EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, and 6 more countries.
Does EST observe daylight saving time?
Yes, EST switches to EDT during summer months.
What are some interesting facts about EST?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
Which cities are in the AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in EST, what time is it in Sydney?
When it is 12:00 AM (midnight) in EST (EST), it is +15h later in Sydney (AEST).
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