AEDT to KST Converter
Convert time between Australian Eastern Daylight Time (AEDT) and Korea Standard Time (KST)
Australian Eastern Daylight Time (AEDT)
Korea Standard Time (KST)
Time Difference
Korea Standard Time (KST) is 0 hours ahead of Australian Eastern Daylight Time (AEDT)
Select Date
Select Time
Quick Reference
| AEDT | KST |
|---|---|
| 12:00 | 11:00 |
| 14:00 | 13:00 |
| 16:00 | 15:00 |
| 18:00 | 17:00 |
| 20:00 | 19:00 |
| 22:00 | 21:00 |
| 00:00 | 23:00 |
| 02:00 | 01:00 |
| 04:00 | 03:00 |
| 06:00 | 05:00 |
| 08:00 | 07:00 |
| 10:00 | 09:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About AEDT to KST Time Conversion
Converting time between Australian Eastern Daylight Time (AEDT) and Korea Standard Time (KST) coordinates Sydney, Melbourne, Canberra and Hobart with Seoul, Busan, Incheon and Daegu during the southern summer. AEDT is UTC+11 while KST is UTC+9, placing AEDT 2 hours ahead of KST. South Korea does not observe daylight saving, so KST stays constant while the AEDT offset shifts seasonally.
This converter uses the IANA timezone database to handle daylight saving transitions automatically. AEDT runs from the first Sunday in October to the first Sunday in April. Outside that window, Australia's eastern states use AEST (UTC+10), reducing the offset to KST to just 1 hour. The 2-hour gap during AEDT is small enough that the workday overlaps comfortably for both teams.
Common Use Cases for AEDT to KST Conversion
Business & Work
- Scheduling meetings between Sydney or Melbourne offices and Seoul corporate teams during Australian summer
- Coordinating manufacturing and supply-chain handoffs between Eastern Australia and South Korea
- Planning conference calls and product launches across AEDT and KST markets
Personal & Travel
- Planning travel between Eastern Australia and South Korea
- Coordinating with family and friends in Seoul, Busan, Incheon or Daegu
- Scheduling virtual events, gaming sessions and online classes for AEDT and KST audiences
Time Zone Information
Australian Eastern Daylight Time (AEDT)
- UTC Offset: UTC+11
- IANA Timezone: Australia/Sydney
- Daylight Saving: First Sunday in October to First Sunday in April
- Major Cities: Sydney, Melbourne, Canberra, Hobart, Newcastle
- Coverage: New South Wales, Victoria, Tasmania, ACT during southern summer
Korea Standard Time (KST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Seoul
- Daylight Saving: None - KST is observed year-round
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju
- Coverage: All of South Korea
Quick Reference: AEDT to KST
Remember: KST is always 2 hours behind AEDT during Australian summer
Frequently Asked Questions
What is the time difference between AEDT and KST?
Australian Eastern Daylight Time (AEDT) is UTC+11, while Korea Standard Time (KST) is UTC+9. AEDT is 2 hours ahead of KST. When it is 12:00 PM in Sydney, it is 10:00 AM in Seoul.
When does this AEDT to KST conversion apply?
AEDT runs from the first Sunday in October to the first Sunday in April. Outside that window, Australia's eastern states use AEST (UTC+10), reducing the offset to KST to just 1 hour. Confirm the season before relying on a fixed conversion.
How does the time difference change throughout the year?
South Korea does not observe daylight saving, so KST stays at UTC+9 year-round. The variation comes from Australia: AEDT (UTC+11) is 2 hours ahead, while AEST (UTC+10) is 1 hour ahead. The offset shifts twice a year, in early October and early April.
What are the best times for AEDT-KST business calls?
The 2-hour gap is small enough that the workday overlaps comfortably. 11:00 AM–5:00 PM AEDT equals 9:00 AM–3:00 PM KST — covers most of both business days. Avoid scheduling before 10:00 AM AEDT to keep mornings reasonable in Seoul.
Which countries/regions use KST timezone?
KST is used across all of South Korea. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon, and Gwangju. South Korea does not observe daylight saving, so KST is the same year-round.
Which countries/regions use AEDT timezone?
AEDT is used in New South Wales, Victoria, Tasmania, and the Australian Capital Territory during southern summer. Major cities include Sydney, Melbourne, Canberra, Hobart, and Newcastle. Brisbane and the rest of Queensland stay on AEST year-round and do not observe DST.
Pro Tips
- • AEDT is 2 hours ahead of KST — subtract 2 hours from a Sydney time to get the Seoul time.
- • Korea has no daylight saving. The 2-hour offset only applies during AEDT (October–April); in AEST it drops to 1 hour.
- • Best meeting window: 11:00 AM–5:00 PM AEDT equals 9:00 AM–3:00 PM KST — full business day for both teams.
- • Lunch in Sydney (1:00 PM AEDT) is 11:00 AM in Seoul, a great time for a kickoff or standup.
- • Use IANA identifiers (Australia/Sydney and Asia/Seoul) in calendars so the AEDT/AEST switch is handled automatically.
- • Brisbane stays on AEST year-round, not AEDT. Confirm whether your eastern Australian contact is in Sydney/Melbourne or Brisbane before scheduling.