Toolman

Time difference between Denver and Seoul

Seoul is 15 hours ahead of Denver

Denver, the United States is UTC−7 · 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 Denver goes forward on the second Sunday in March and back on the first Sunday in November and Seoul does not change its clocks.

Denver / Seoul clocksDifferenceHow long
summer / standard15 hours aheadabout 34 weeks — most of the year
standard / standard16 hours aheadabout 18 weeks

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

When they can both be at their desks

Nine-to-five in Denver and nine-to-five in Seoul do not overlap at all. With 15 hours between them, one side is always outside working hours, and the practical question is which side takes the early start or the late finish rather than when to meet.

Denver to Seoul, hour by hour

DenverSeoul
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 (next day)
10:00 AM1:00 AM (next day)
11:00 AM2:00 AM (next day)
12:00 PM3:00 AM (next day)
1:00 PM4:00 AM (next day)
2:00 PM5:00 AM (next day)
3:00 PM6:00 AM (next day)
4:00 PM7:00 AM (next day)
5:00 PM8:00 AM (next day)
6:00 PM9:00 AM (next day)
7:00 PM10:00 AM (next day)
8:00 PM11:00 AM (next day)
9:00 PM12:00 PM (next day)
10:00 PM1:00 PM (next day)
11:00 PM2:00 PM (next day)

On the usual gap of 15 hours.

Frequently asked questions

What is the time difference between Denver and Seoul?

Seoul is 15 hours ahead of Denver for most of the year. It is not the same all year — there is one other gap, because Denver goes forward on the second Sunday in March and back on the first Sunday in November and Seoul does not change its clocks.

Is Seoul ahead of Denver?

Yes — Seoul is 15 hours ahead. Denver is UTC−7 and Seoul is UTC+9 on standard time.

What time is 9 AM in Denver in Seoul?

12:00 AM (next day), on the usual gap.

When can Denver and Seoul meet?

Nine-to-five in Denver and nine-to-five in Seoul do not overlap at all. One side has to take the call outside working hours, and with 15 hours between them it is worth deciding in advance which side that is.

Other pairs

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