Foster City to Seoul time converter

Seoul is 16 hours ahead of Foster City. When it is 9:00 AM in Foster City, it is 1:00 AM (Thu, Oct 22) in Seoul.

Foster City PDT

Wednesday, October 21, 2026

Seoul KST

Thursday, October 22, 2026

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

Foster City to Seoul conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 21, 2026 – Nov 1, 2026: +16h
  • Nov 1, 2026 – Mar 14, 2027: +17h
  • Mar 14, 2027 – Oct 21, 2027: +16h

Distance

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

More conversions

Seoul to Foster CityFoster City to New YorkFoster City to LondonFoster City to Los AngelesFoster City to ChicagoFoster City to TorontoFoster City to São PauloFoster City to ParisFoster City to BerlinFoster City to MoscowFoster City to DubaiFoster City to New DelhiFoster City to Bangkok
New York to SeoulLondon to SeoulLos Angeles to SeoulChicago to SeoulToronto to SeoulSão Paulo to SeoulParis to SeoulBerlin to SeoulMoscow to SeoulDubai to SeoulNew Delhi to SeoulBangkok to Seoul

Questions and answers

What is the time difference between Foster City and Seoul?

Seoul is 16 hours ahead of Foster City.

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

When it is 9:00 AM in Foster City, it is 1:00 AM (Thu, Oct 22) in Seoul.

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

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

Does the time difference between Foster City and Seoul change?

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