Seoul to Adelphi time converter

Adelphi is 13 hours behind Seoul. When it is 9:00 AM in Seoul, it is 8:00 PM (Sat, Oct 17) in Adelphi.

Seoul KST

Sunday, October 18, 2026

Adelphi EDT

Sunday, October 18, 2026

Seoul
South Korea
Sun, Oct 18
KSTUTC+9
Adelphi
Maryland, United States
Sun, Oct 18
EDTUTC-4-13h
Finding your time zone…
Shared working hours (9:00–18:00)

Seoul to Adelphi conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 9:00 AM – 11:00 AM in Seoul (8:00 PM – 10:00 PM in Adelphi): working hours on one side, early or late on the other.

Daylight saving time and the difference

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

  • Oct 18, 2026 – Nov 1, 2026: -13h
  • Nov 1, 2026 – Mar 14, 2027: -14h
  • Mar 14, 2027 – Oct 18, 2027: -13h

Distance

Seoul and Adelphi are 11,156 km (6,932 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between Seoul and Adelphi?

Adelphi is 13 hours behind Seoul.

What time is it in Adelphi when it is 9 AM in Seoul?

When it is 9:00 AM in Seoul, it is 8:00 PM (Sat, Oct 17) in Adelphi.

When is the best time to call Adelphi from Seoul?

Working hours don't overlap fully. The closest fit is 9:00 AM – 11:00 AM in Seoul (8:00 PM – 10:00 PM in Adelphi): working hours on one side, early or late on the other.

Does the time difference between Seoul and Adelphi change?

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