Sydney to Buenos Aires
-13hSydney
AESTSOURCEBuenos Aires
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and ART on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and ART (Argentina Time) timezone regions across the globe.
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.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
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.
About Buenos Aires
WikipediaBuenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
The Teatro Colón is considered one of the best opera houses in the world for acoustics.
Sydney to Buenos Aires Time Difference – Complete Guide
Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. That puts Sydney 13 hours behind Buenos Aires — a difference of -13h at the current offsets.
In practice, when it is 9:00 AM in Sydney it is 8:00 PM in Buenos Aires on the previous day. Midnight in Sydney is 11:00 AM in Buenos Aires. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Sydney to Buenos Aires time conversion table
| Sydney (AEST) | Buenos Aires (ART) | Day |
|---|---|---|
| 12:00 AM | 11:00 AM | previous day |
| 6:00 AM | 5:00 PM | previous day |
| 7:00 AM | 6:00 PM | previous day |
| 8:00 AM | 7:00 PM | previous day |
| 9:00 AM | 8:00 PM | previous day |
| 12:00 PM | 11:00 PM | previous day |
| 3:00 PM | 2:00 AM | same day |
| 5:00 PM | 4:00 AM | same day |
| 6:00 PM | 5:00 AM | same day |
| 9:00 PM | 8:00 AM | same day |
Why people convert Sydney to Buenos Aires time
- Scheduling a call from Sydney to Buenos Aires: a 10:00 AM start in Sydney lands at 9:00 PM in Buenos Aires the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h gap: Sydney and Buenos Aires 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 Buenos Aires is 8:00 PM in Sydney.
- Coordinating a Sydney-based team with Buenos Aires contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -13h gap is not.
- With a -13h gap there is no shared 9-to-5 window, so alternate the early start: one week Sydney takes the early slot, the next week Buenos Aires does.
- Sydney: Clocks spring forward on Sat, Oct 3, 2026. Re-check this page after that date because the offset changes and so does the -13h gap.
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.
About ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between Sydney and Buenos Aires
With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. Buenos Aires opens at 9:00 AM ART, which is 8:00 PM in Sydney, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Sydney and Buenos Aires have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Sydney is 13 hours behind Buenos Aires (AEST UTC+10:00 → ART UTC-03:00). 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
Sydney
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
Buenos Aires
Does not observe DST
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 Sydney and Buenos Aires?
Sydney (AEST, UTC+10:00) is 13 hours behind Buenos Aires (ART, UTC-03:00). The gap is currently -13h.
How do I convert Sydney time to Buenos Aires time?
Add -13h to Sydney local time. For example, 9:00 AM in Sydney is 8:00 PM in Buenos Aires (previous day).
What time is it in Buenos Aires right now?
Buenos Aires uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Sydney.
What is the best time to call Buenos Aires from Sydney?
There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Sydney, which is 12:00 AM in Buenos Aires.
Which is behind, Sydney or Buenos Aires?
Sydney is 13 hours behind Buenos Aires. When it is 12:00 PM in Sydney it is 11:00 PM in Buenos Aires.
Do Sydney and Buenos Aires use different time zones?
Sydney (Australia) uses AEST at UTC+10:00, while Buenos Aires (Argentina) uses ART at UTC-03:00. The IANA identifiers are Australia/Sydney and America/Buenos_Aires.
Does daylight saving time affect the Sydney–Buenos Aires difference?
Neither zone observes daylight saving time, so the -13h offset between Sydney and Buenos Aires is fixed all year.
Which other cities share Sydney's time zone?
AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
Which countries use AEST, Sydney's zone?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Is there a day difference between Sydney and Buenos Aires?
Sometimes. The -13h gap is large enough that 8:00 PM or later in Sydney already falls on the in Buenos Aires.
What is the time difference between Sydney and Buenos Aires?
Buenos Aires is -13h from Sydney.
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 timezone is Buenos Aires in?
Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
What are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
What are the business hours in Buenos Aires?
Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.
What is the best time to schedule a call between Sydney and Buenos Aires?
The best overlap for a call is when both cities are in business hours. Sydney works 9:00 AM - 5:00 PM AEST and Buenos Aires works 9:00 AM - 6:00 PM ART (-13h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Sydney and Buenos Aires?
Sydney uses AUD (A$) while Buenos Aires uses ARS ($). Check current exchange rates when planning travel or business between these cities.
How do Sydney and Buenos Aires compare in size?
Sydney has a population of approximately 5.4 million (metro: 5.4 million), while Buenos Aires has approximately 3 million (metro: 15.4 million).
What are the major landmarks in Sydney and Buenos Aires?
Sydney is known for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach. Buenos Aires is famous for Casa Rosada, Teatro Colón, La Boca.
Do Sydney and Buenos Aires have stock exchanges?
Yes. Sydney has the ASX (Australian Securities Exchange) and Buenos Aires has the BCBA (Buenos Aires Stock Exchange). The -13h time difference affects trading hour overlaps between these exchanges.
Which countries use AEST (Australian Eastern Standard Time)?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Does AEST observe daylight saving time?
Yes, AEST switches to AEDT during summer months.
What are some interesting facts about AEST?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
Which cities are in the ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in Sydney, what time is it in Buenos Aires?
When it is 12:00 AM (midnight) in Sydney (AEST), it is -13h later in Buenos Aires (ART).
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