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Time difference between Sydney and Seoul

Seoul is 1 hour behind Sydney

Sydney, Australia is UTC+10 · Seoul, South Korea is UTC+9 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because Sydney goes forward on the first Sunday in October and back on the first Sunday in April and Seoul does not change its clocks.

Sydney / Seoul clocksDifferenceHow long
standard / standard1 hour behindabout 26 weeks
summer / standard2 hours behindabout 26 weeks

Seoul stays put all year while Sydney moves, so a meeting fixed in Seoul's calendar shifts by an hour twice a year at Sydney's end.

When they can both be at their desks

Nine-to-five in both cities overlaps for 7 hours — 10:00 AM to 5:00 PM in Sydney, the same moment as 9:00 AM to 4:00 PM in Seoul.

Sydney to Seoul, hour by hour

SydneySeoul
12:00 AM11:00 PM (previous day)
1:00 AM12:00 AM
2:00 AM1:00 AM
3:00 AM2:00 AM
4:00 AM3:00 AM
5:00 AM4:00 AM
6:00 AM5:00 AM
7:00 AM6:00 AM
8:00 AM7:00 AM
9:00 AM8:00 AM
10:00 AM9:00 AM
11:00 AM10:00 AM
12:00 PM11:00 AM
1:00 PM12:00 PM
2:00 PM1:00 PM
3:00 PM2:00 PM
4:00 PM3:00 PM
5:00 PM4:00 PM
6:00 PM5:00 PM
7:00 PM6:00 PM
8:00 PM7:00 PM
9:00 PM8:00 PM
10:00 PM9:00 PM
11:00 PM10:00 PM

On the usual gap of 1 hour.

Frequently asked questions

What is the time difference between Sydney and Seoul?

Seoul is 1 hour behind Sydney for most of the year. It is not the same all year — there is one other gap, because Sydney goes forward on the first Sunday in October and back on the first Sunday in April and Seoul does not change its clocks.

Is Seoul ahead of Sydney?

No — Seoul is 1 hour behind. Sydney is UTC+10 and Seoul is UTC+9 on standard time.

What time is 9 AM in Sydney in Seoul?

8:00 AM, on the usual gap.

When can Sydney and Seoul meet?

Standard nine-to-five hours overlap for 7 hours: 10:00 AM–5:00 PM in Sydney, which is 9:00 AM–4:00 PM in Seoul.

Other pairs

Every Sydney pair · Every Seoul pair · All city pairs · Time zones by abbreviation