Korea Standard Time (kst) is used in South Korea. The IANA timezone identifier is Asia/Seoul.

Australian Eastern Daylight Time (aedt) is used in Australia. The IANA timezone identifier is Australia/Sydney.

KST to AEDT Time Converter

Korea Standard Time → Australian Eastern Daylight Time

KST = UTC+9AEDT = UTC+10

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

AEDT (Sydney)

Australia · +1h🎉 Public Holiday -King's Birthday

10:00

London

United Kingdom · -8h

01:00

New York

USA · -13h

20:00-1 day

Tokyo

Japan · UTC±0

09:00

Dubai

United Arab Emirates · -5h

04:00

KST (Seoul) ↔ AEDT (Sydney) — time offset

KST (Seoul) is 1 hour behind AEDT (Sydney). Midday in KST (Seoul) lines up with 13:00 in AEDT (Sydney).

KST (Seoul) runs on Asia/Seoul; AEDT (Sydney) runs on Australia/Sydney. Together they are 1 hour apart.

Mutual working hours

There is a 7-hour window each day where both KST (Seoul) and AEDT (Sydney) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

KST (Seoul)

AEDT (Sydney)

Overlap (7h)

Best times to schedule a meeting

There is a 7-hour daily window where both locations are in business hours. The 3 best slots are listed below.

09:00 Seoul / 10:00 Sydney✓ Both working

10:00 Seoul / 11:00 Sydney✓ Both working

11:00 Seoul / 12:00 Sydney✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Upcoming public holidays

⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.

KST (Seoul)7 holidays

Aug 15Liberation Day

Sep 24Chuseok

Sep 25Chuseok

Sep 26Chuseok

Oct 3National Foundation Day

AEDT (Sydney)8 holidays

Jun 8King's BirthdayTODAY

Aug 3Picnic Day

Sep 28King's Birthday

Oct 5Labour Day

Oct 5King's Birthday

How to work with KST (Seoul) and AEDT (Sydney) time zones

The 1-hour gap between KST (Seoul) (South Korea) and AEDT (Sydney) (Australia) requires some planning — but a 7-hour daily overlap means both teams can connect in real time without unusual scheduling.

💡 How to schedule across these time zones

✅

If you are in KST (Seoul), aim for 09:00–10:00, which corresponds to 10:00–11:00 in AEDT (Sydney) — both teams are within working hours.

✅

If you are in KST (Seoul), aim for 10:00–11:00, which corresponds to 11:00–12:00 in AEDT (Sydney) — both teams are within working hours.

✅

If you are in KST (Seoul), aim for 11:00–12:00, which corresponds to 12:00–13:00 in AEDT (Sydney) — both teams are within working hours.

Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.

Add to your browser — Free →

Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am KST (Seoul)".

KST (Seoul) ↔ AEDT (Sydney)

7h of business hours overlap daily (09:00–17:00)

KST (Seoul)

AEDT (Sydney)

00:00

01:00

02:00

03:00

04:00

05:00

06:00

07:00

08:00

09:00Working

10:00Working

11:00Working

12:00Working

13:00Working

14:00Working

15:00Working

16:00Working

17:00off

17:00

18:00

19:00

20:00

21:00

22:00

23:00

00:00+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between kst and aedt?

Korea Standard Time (kst) is UTC+9 and Australian Eastern Daylight Time (aedt) is UTC+10. The difference between them is 1 hours.

Where is kst used?

Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.

Where is aedt used?

Australian Eastern Daylight Time (aedt) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.

How do I convert kst to aedt?

Use the interactive converter above. Drag the time slider to any kst time and the aedt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular KST conversions

KST → London KST → New York KST → Tokyo KST → Dubai KST → Sydney KST → Paris KST → Berlin KST → Singapore KST → Los Angeles KST → Toronto

Popular AEDT conversions

London → AEDT New York → AEDT Tokyo → AEDT Dubai → AEDT Paris → AEDT Berlin → AEDT Singapore → AEDT Los Angeles → AEDT Toronto → AEDT Mumbai → AEDT