Seoul to Foster City time converter

Foster City is 16 hours behind Seoul. When it is 9:00 AM in Seoul, it is 5:00 PM (Wed, Oct 21) in Foster City.

Seoul KST

Thursday, October 22, 2026

Foster City PDT

Wednesday, October 21, 2026

Seoul
South Korea
Thu, Oct 22
KSTUTC+9
Foster City
California, United States
Wed, Oct 21
PDTUTC-7-16h
Finding your time zone…
Shared working hours (9:00–18:00)

Seoul to Foster City conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 10:00 AM in Seoul (5:00 PM – 6:00 PM in Foster City).

Daylight saving time and the difference

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

  • Oct 22, 2026 – Nov 1, 2026: -16h
  • Nov 1, 2026 – Mar 14, 2027: -17h
  • Mar 14, 2027 – Oct 22, 2027: -16h

Distance

Seoul and Foster City are 9,055 km (5,627 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between Seoul and Foster City?

Foster City is 16 hours behind Seoul.

What time is it in Foster City when it is 9 AM in Seoul?

When it is 9:00 AM in Seoul, it is 5:00 PM (Wed, Oct 21) in Foster City.

When is the best time to call Foster City from Seoul?

Both sides are at work from 9:00 AM – 10:00 AM in Seoul (5:00 PM – 6:00 PM in Foster City).

Does the time difference between Seoul and Foster City change?

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