Highlands Ranch to Seoul time converter

Seoul is 15 hours ahead of Highlands Ranch. When it is 9:00 AM in Highlands Ranch, it is 12:00 AM (Wed, Oct 21) in Seoul.

Highlands Ranch MDT

Tuesday, October 20, 2026

Seoul KST

Tuesday, October 20, 2026

Highlands Ranch
Colorado, United States
Tue, Oct 20
MDTUTC-6
Seoul
South Korea
Tue, Oct 20
KSTUTC+9+15h
Finding your time zone…
Shared working hours (9:00–18:00)

Highlands Ranch to Seoul conversion table

Every hour of today in Highlands Ranch and the matching time in Seoul. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Highlands Ranch (7:00 AM – 9:00 AM in Seoul): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Highlands Ranch and Seoul switch clocks on different dates:

  • Oct 20, 2026 – Nov 1, 2026: +15h
  • Nov 1, 2026 – Mar 14, 2027: +16h
  • Mar 14, 2027 – Oct 20, 2027: +15h

Distance

Highlands Ranch and Seoul are 9,934 km (6,173 miles) apart in a straight line.

More conversions

Seoul to Highlands RanchHighlands Ranch to New YorkHighlands Ranch to LondonHighlands Ranch to Los AngelesHighlands Ranch to ChicagoHighlands Ranch to TorontoHighlands Ranch to São PauloHighlands Ranch to ParisHighlands Ranch to BerlinHighlands Ranch to MoscowHighlands Ranch to DubaiHighlands Ranch to New DelhiHighlands Ranch to Bangkok
New York to SeoulLondon to SeoulLos Angeles to SeoulChicago to SeoulToronto to SeoulSão Paulo to SeoulParis to SeoulBerlin to SeoulMoscow to SeoulDubai to SeoulNew Delhi to SeoulBangkok to Seoul

Questions and answers

What is the time difference between Highlands Ranch and Seoul?

Seoul is 15 hours ahead of Highlands Ranch.

What time is it in Seoul when it is 9 AM in Highlands Ranch?

When it is 9:00 AM in Highlands Ranch, it is 12:00 AM (Wed, Oct 21) in Seoul.

When is the best time to call Seoul from Highlands Ranch?

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Highlands Ranch (7:00 AM – 9:00 AM in Seoul): working hours on one side, early or late on the other.

Does the time difference between Highlands Ranch and Seoul change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.