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City data by GeoNames (CC BY 4.0). Timezone data from IANA Time Zone Database.

  1. WorldClockTools
  2. Country comparison
  3. South Korea vs United States

Pair comparison

South Korea vs United States

South Korea is 13.0 hours ahead of United States. They have no overlap in standard 9-to-6 business hours — you'll need edge-hour meetings.

South Korea

Capital: Seoul

19:54GMT+9

Fri · Apr 24 · UTC+09:00

DST shifts / 12mo
0
Public holidays 2026
15

United States

Capital: New York

06:54EDT

Fri · Apr 24 · UTC-04:00

DST shifts / 12mo
2
Public holidays 2026
16

Business-hour overlap

No overlap in standard 9–18 local working hours. You'll typically schedule synchronous meetings in the early morning for one side and late evening for the other.

24-hour overlap heatmap (UTC across the bottom)

South Korea
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07
08
United States
20
21
22
23
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
000102030405060708091011121314151617181920212223
  • Working hours (09–18 local)
  • Edge hours (07–09, 18–22)
  • Sleep hours (22–07)

Overlapping public holidays in 2026 (3)

  • 2026-01-01South Korea: New Year's Day · United States: New Year's Day
  • 2026-02-16South Korea: Lunar New Year · United States: Presidents Day
  • 2026-12-25South Korea: Christmas Day · United States: Christmas Day

Both teams may be off on the dates above — useful for sprint planning and launch calendars.

Other comparisons involving South Korea

  • South Korea vs India
  • South Korea vs Japan