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

KST to SYDNEY Time Converter

Q: Where is sydney used?

SYDNEY (Sydney) (sydney) is used in Australia. The IANA timezone identifier is Australia/Sydney.

Korea Standard Time → SYDNEY (Sydney)

KST = UTC+9SYDNEY = UTC+10

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

Sydney

Australia · +1h

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) vs Sydney — time difference

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

KST (Seoul) is in the Asia/Seoul timezone. Sydney is in Australia/Sydney. The difference is 1 hour.

Shared working hours

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

00:0006:0012:0018:0024:00

KST (Seoul)

Sydney

Overlap (7h)

When to schedule across time zones

Both KST (Seoul) and Sydney are in standard hours simultaneously for 7h per day. 3 recommended slots shown 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

Based on standard 09:00–17:00 working hours in each location's local time.

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

Sydney7 holidays

Aug 3Picnic Day

Sep 28King's Birthday

Oct 5Labour Day

Oct 5King's Birthday

Nov 3Melbourne Cup

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

Working across KST (Seoul) (South Korea) and Sydney (Australia) involves a 1-hour gap. The good news: there is a 7-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.

💡 How to schedule across these time zones

✅

09:00–10:00 in KST (Seoul) = 10:00–11:00 in Sydney. Both sides are in standard business hours during this window.

✅

10:00–11:00 in KST (Seoul) = 11:00–12:00 in Sydney. Both sides are in standard business hours during this window.

✅

11:00–12:00 in KST (Seoul) = 12:00–13:00 in Sydney. Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in KST (Seoul). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

KST (Seoul) ↔ SYDNEY (Sydney)

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

KST (Seoul)

SYDNEY (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 sydney?

Korea Standard Time (kst) is UTC+9 and SYDNEY (Sydney) (sydney) 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 sydney used?

SYDNEY (Sydney) (sydney) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.

How do I convert kst to sydney?

Use the interactive converter above. Drag the time slider to any kst time and the sydney 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 SYDNEY conversions

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