Sydney to Vienna
-8hSydney
AESTSOURCEVienna
CESTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and CEST on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and CEST (Central European 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.
CET – Central European Time
UTC+01:00Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.
- •CET covers more European countries than any other time zone.
- •Spain uses CET despite being geographically aligned with GMT/WET.
- •The Frankfurt Stock Exchange, Euronext (Amsterdam/Paris), and Borsa Italiana operate on CET.
- •Over 500 million people live in the CET time zone.
- •France moved to CET during the German occupation in WWII and never switched back.
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 Vienna
WikipediaVienna operates on Central European Time (CET/CEST). As a major EU hub and headquarters for international organizations, Vienna coordinates Central European business.
Vienna has more than 50 theaters and opera houses.
Comparing Time Zones: Sydney and Vienna
Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. Vienna runs on Central European Summer Time (CEST) at UTC+02:00, also currently on daylight saving time. That puts Sydney 8 hours behind Vienna — a difference of -8h at the current offsets.
In practice, when it is 9:00 AM in Sydney it is 1:00 AM in Vienna. Midnight in Sydney is 4:00 PM in Vienna.Vienna observes daylight saving time while Sydney does not, so the gap narrows or widens by an hour part of the year.
Sydney to Vienna time conversion table
| Sydney (AEST) | Vienna (CEST) | Day |
|---|---|---|
| 12:00 AM | 4:00 PM | previous day |
| 6:00 AM | 10:00 PM | previous day |
| 7:00 AM | 11:00 PM | previous day |
| 8:00 AM | 12:00 AM | same day |
| 9:00 AM | 1:00 AM | same day |
| 12:00 PM | 4:00 AM | same day |
| 3:00 PM | 7:00 AM | same day |
| 5:00 PM | 9:00 AM | same day |
| 6:00 PM | 10:00 AM | same day |
| 9:00 PM | 1:00 PM | same day |
Why people convert Sydney to Vienna time
- Scheduling a call from Sydney to Vienna: a 10:00 AM start in Sydney lands at 2:00 AM in Vienna, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -8h gap: Sydney and Vienna 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 Vienna is 1:00 AM in Sydney.
- Keeping family and friends in sync: knowing that 8:00 PM in Sydney is 12:00 PM in Vienna makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -8h gap is not.
- With a -8h gap there is no shared 9-to-5 window, so alternate the early start: one week Sydney takes the early slot, the next week Vienna 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 -8h gap.
- Vienna: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 CET (Central European Time)
Central European Time (CET) is the standard time zone for most of Europe, covering over 30 countries from Spain to Poland, and from Norway to Italy. CET is 1 hour ahead of GMT and is used by the European Union's most populous nations. During summer, most CET countries switch to Central European Summer Time (CEST, UTC+02:00). Major European financial markets in Frankfurt, Paris, and Amsterdam operate on CET.
Best time to call between Sydney and Vienna
With a -8h offset there is no overlap inside a normal 9 AM – 5 PM day. Vienna opens at 9:00 AM CEST, which is 1:00 AM in Sydney, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Sydney and Vienna have no shared working hours because of the -8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Sydney is 8 hours behind Vienna (AEST UTC+10:00 → CEST UTC+02:00). 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
Vienna
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
Clocks fall back on Sun, Oct 25, 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 Sydney and Vienna?
Sydney (AEST, UTC+10:00) is 8 hours behind Vienna (CEST, UTC+02:00). The gap is currently -8h.
How do I convert Sydney time to Vienna time?
Add -8h to Sydney local time. For example, 9:00 AM in Sydney is 1:00 AM in Vienna.
What time is it in Vienna right now?
Vienna uses CEST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -8h offset from Sydney.
What is the best time to call Vienna from Sydney?
There is no shared working-hours window because of the -8h gap. The closest option is 1:00 PM in Sydney, which is 5:00 AM in Vienna.
Which is behind, Sydney or Vienna?
Sydney is 8 hours behind Vienna. When it is 12:00 PM in Sydney it is 4:00 AM in Vienna.
Do Sydney and Vienna use different time zones?
Sydney (Australia) uses AEST at UTC+10:00, while Vienna (Austria) uses CEST at UTC+02:00. The IANA identifiers are Australia/Sydney and Europe/Vienna.
Does daylight saving time affect the Sydney–Vienna difference?
Yes at the moment: Vienna is on daylight saving time and Sydney is not, so the -8h gap shifts by an hour when exactly one of them changes clocks.
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 Vienna?
Not normally. The -8h gap only pushes the date over the previous day.
What is the time difference between Sydney and Vienna?
Vienna is -8h 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 Vienna in?
Vienna operates on Central European Time (CET/CEST). As a major EU hub and headquarters for international organizations, Vienna coordinates Central European business.
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 Vienna?
Standard business hours in Vienna are 8:00 AM - 5:00 PM CET.
What is the best time to schedule a call between Sydney and Vienna?
The best overlap for a call is when both cities are in business hours. Sydney works 9:00 AM - 5:00 PM AEST and Vienna works 8:00 AM - 5:00 PM CET (-8h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Sydney and Vienna?
Sydney uses AUD (A$) while Vienna uses EUR (€). Check current exchange rates when planning travel or business between these cities.
How do Sydney and Vienna compare in size?
Sydney has a population of approximately 5.4 million (metro: 5.4 million), while Vienna has approximately 1.9 million (metro: 2.9 million).
What are the major landmarks in Sydney and Vienna?
Sydney is known for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach. Vienna is famous for Schönbrunn Palace, St. Stephen's Cathedral, Belvedere Palace.
Do Sydney and Vienna have stock exchanges?
Yes. Sydney has the ASX (Australian Securities Exchange) and Vienna has the Wiener Börse. The -8h 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 CET timezone?
Major cities in the CET timezone include Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw.
What is the UTC offset for CET?
Central European Time (CET) is at UTC+01:00. During daylight saving time, it shifts to CEST.
What should I know about the CET timezone?
CET covers more European countries than any other time zone. Spain uses CET despite being geographically aligned with GMT/WET.
When is it midnight in Sydney, what time is it in Vienna?
When it is 12:00 AM (midnight) in Sydney (AEST), it is -8h later in Vienna (CET).
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