Seoul to Union time converter

Union is 13 hours behind Seoul. When it is 9:00 AM in Seoul, it is 8:00 PM (Sun, Oct 18) in Union.

Seoul KST

Monday, October 19, 2026

Union EDT

Sunday, October 18, 2026

Seoul
South Korea
Mon, Oct 19
KSTUTC+9
Union
New Jersey, United States
Sun, Oct 18
EDTUTC-4-13h
Finding your time zone…
Shared working hours (9:00–18:00)

Seoul to Union conversion table

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

SeoulUnion
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 Union): 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 Union switch clocks on different dates:

  • Oct 19, 2026 – Nov 1, 2026: -13h
  • Nov 1, 2026 – Mar 14, 2027: -14h
  • Mar 14, 2027 – Oct 19, 2027: -13h

Distance

Seoul and Union are 11,048 km (6,865 miles) apart in a straight line.

More conversions

Union to SeoulSeoul to New YorkSeoul to LondonSeoul to Los AngelesSeoul to ChicagoSeoul to TorontoSeoul to São PauloSeoul to ParisSeoul to BerlinSeoul to MoscowSeoul to DubaiSeoul to New DelhiSeoul to Bangkok
New York to UnionLondon to UnionLos Angeles to UnionChicago to UnionToronto to UnionSão Paulo to UnionParis to UnionBerlin to UnionMoscow to UnionDubai to UnionNew Delhi to UnionBangkok to Union

Questions and answers

What is the time difference between Seoul and Union?

Union is 13 hours behind Seoul.

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

When it is 9:00 AM in Seoul, it is 8:00 PM (Sun, Oct 18) in Union.

When is the best time to call Union 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 Union): working hours on one side, early or late on the other.

Does the time difference between Seoul and Union change?

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