Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Sydney to Seoul

-1h

Sydney

AESTSOURCE

Australia · UTC+10:00DST observed

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Seoul

KST

South Korea · UTC+09:00

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Sydney

Seoul

12:00 AM

11:00 PM-1

2:00 AM

1:00 AM

4:00 AM

3:00 AM

6:00 AM

5:00 AM

8:00 AM

7:00 AM

10:00 AM

9:00 AM

12:00 PM

11:00 AM

2:00 PM

1:00 PM

4:00 PM

3:00 PM

6:00 PM

5:00 PM

8:00 PM

7:00 PM

10:00 PM

9:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

AEST and KST on the World Map

The map below highlights the AEST (Australian Eastern Standard Time) and KST (Korea Standard Time) timezone regions across the globe.

AEST Zone

→

KST Zone

Explore all world timezones interactively →

AEST – Australian Eastern Standard Time

UTC+10:00

Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.

Countries in AEST

Australia (NSW, VIC, QLD, TAS, ACT)Papua New Guinea

Major Cities in AEST

SydneyMelbourneBrisbaneCanberraHobartGold Coast

Key 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.
•The Australian Securities Exchange (ASX) operates on AEST/AEDT.
•AEST is 15 hours ahead of EST during winter.

Daylight Saving:Yes – switches to AEDT

Learn more about AEST on Wikipedia

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST

South KoreaNorth Korea

Major Cities in KST

SeoulBusanIncheonDaeguDaejeonPyongyang

Key Facts about KST

•South Korea does not observe daylight saving time.
•Seoul is home to Samsung, LG, and Hyundai headquarters.
•KST is the same offset as JST (UTC+09:00).

Daylight Saving:No – UTC+09:00 year-round

Learn more about KST on Wikipedia

About Sydney

Wikipedia

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.

Population:5.4 million

Metro:5.4 million

Business Hours:9:00 AM - 5:00 PM AEST

Currency:AUD (A$)

Stock Exchange:ASX (Australian Securities Exchange)

Key Landmarks

Sydney Opera HouseSydney Harbour BridgeBondi BeachDarling HarbourRoyal Botanic Garden

Did You Know?

Sydney is one of the first major cities to welcome the New Year.

Learn more about AEST timezone →

About Seoul

Wikipedia

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

Population:9.7 million

Metro:25.5 million

Business Hours:9:00 AM - 6:00 PM KST

Currency:KRW (₩)

Stock Exchange:KRX (Korea Exchange)

Key Landmarks

Gyeongbokgung PalaceN Seoul TowerBukchon Hanok VillageDongdaemun Design PlazaCheonggyecheon Stream

Did You Know?

Seoul has the fastest average internet speed in the world.

Learn more about KST timezone →

Time Conversion Guide: Sydney to Seoul

Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts Sydney 1 hour behind Seoul — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in Sydney it is 8:00 AM in Seoul. Midnight in Sydney is 11:00 PM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Sydney to Seoul time conversion table

Sydney (AEST)	Seoul (KST)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert Sydney to Seoul time

Scheduling a call from Sydney to Seoul: a 10:00 AM start in Sydney lands at 9:00 AM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Sydney and Seoul are inside the 9-to-5 working day between 10:00 AM and 5:00 PM AEST time (9:00 AM–4:00 PM KST). That is roughly 7 hours of usable overlap.
Coordinating a Sydney-based team with Seoul 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 -1h gap is not.
Block 10:00 AM–5:00 PM AEST as the recurring meeting window if you work primarily from Sydney and need Seoul colleagues present.
Sydney: Clocks spring forward on Sat, Oct 3, 2026. Re-check this page after that date because the offset changes and so does the -1h 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 KST (Korea Standard Time)

Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.

Best time to call between Sydney and Seoul

Both Sydney and Seoul sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM AEST, which is 9:00 AM–4:00 PM KST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Sydney and Seoul share 7 hours of working-hours overlap (10:00 AM–5:00 PM AEST), so scheduling a live meeting is straightforward.

Sydney is 1 hour behind Seoul (AEST UTC+10:00 → KST UTC+09:00). The shared working window is 10:00 AM–5:00 PM AEST. 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

Seoul

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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Sydney and Seoul?

Sydney (AEST, UTC+10:00) is 1 hour behind Seoul (KST, UTC+09:00). The gap is currently -1h.

How do I convert Sydney time to Seoul time?

Add -1h to Sydney local time. For example, 9:00 AM in Sydney is 8:00 AM in Seoul.

What time is it in Seoul right now?

Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Sydney.

What is the best time to call Seoul from Sydney?

Call between 10:00 AM and 5:00 PM AEST — that maps to 9:00 AM–4:00 PM KST and keeps both parties inside the working day.

Which is behind, Sydney or Seoul?

Sydney is 1 hour behind Seoul. When it is 12:00 PM in Sydney it is 11:00 AM in Seoul.

Do Sydney and Seoul use different time zones?

Sydney (Australia) uses AEST at UTC+10:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are Australia/Sydney and Asia/Seoul.

Does daylight saving time affect the Sydney–Seoul difference?

Neither zone observes daylight saving time, so the -1h offset between Sydney and Seoul 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 Seoul?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between Sydney and Seoul?

Seoul is -1h 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 Seoul in?

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

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 Seoul?

Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.

What is the best time to schedule a call between Sydney and Seoul?

The best overlap for a call is when both cities are in business hours. Sydney works 9:00 AM - 5:00 PM AEST and Seoul works 9:00 AM - 6:00 PM KST (-1h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Sydney and Seoul?

Sydney uses AUD (A$) while Seoul uses KRW (₩). Check current exchange rates when planning travel or business between these cities.

How do Sydney and Seoul compare in size?

Sydney has a population of approximately 5.4 million (metro: 5.4 million), while Seoul has approximately 9.7 million (metro: 25.5 million).

What are the major landmarks in Sydney and Seoul?

Sydney is known for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach. Seoul is famous for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village.

Do Sydney and Seoul have stock exchanges?

Yes. Sydney has the ASX (Australian Securities Exchange) and Seoul has the KRX (Korea Exchange). The -1h time difference affects trading hour overlaps between these exchanges.