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Time difference between Boston and Seoul

Seoul is 13 hours ahead of Boston.

Boston
United States · Eastern Daylight Time
3:42 AM
Wednesday, October 21, 2026
Seoul
South Korea · Korean Standard Time
4:42 PM
Wednesday, October 21, 2026
Compare more placesSeoul to Boston

Boston to Seoul time converter

Green rows are office hours in both places; light green rows are when both are awake.

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

Questions

What is the time difference between Boston and Seoul?

Seoul is 13 hours ahead of Boston. Boston is on UTC−4 and Seoul is on UTC+9.

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

When it is 9:00 AM in Boston, it is 10:00 PM in Seoul.

When is the best time to call Seoul from Boston?

There are no shared office hours. The most comfortable time to call is 8:00 AM–9:00 AM in Boston (9:00 PM–10:00 PM in Seoul); 7:00 PM–10:00 PM in Boston (8:00 AM–11:00 AM in Seoul), when both places are awake.

Does the time difference between Boston and Seoul change?

Yes. Because of daylight saving time, the difference changes on Sunday, November 1, 2026, when Seoul will be 14 hours ahead of Boston.

Boston is 13 hours behind Seoul. More: time in Boston · time in Seoul

Time difference from Boston to other cities

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Time difference from Seoul