Does San Francisco observe daylight saving time?

Yes. San Francisco is on PDT (UTC-7) now, and its clocks go back 1 hour on Sun, Nov 1, to PST (UTC-8).

Does Seoul observe daylight saving time?

No. Seoul stays on KST (UTC+9) all year, so its clocks don't change.

What time is it in Seoul when it's 9 AM in San Francisco?

1:00 AM in Seoul, the next day (Sun, Oct 18, when it's Sat, Oct 17 in San Francisco).

San Francisco to Seoul Meeting Planner

Seoul is 16 hours ahead of San Francisco right now. Their working days don't overlap today.

San Francisco · United States

5:16 AM

Sat, Oct 17 · PDT · summer time

Seoul · South Korea

9:16 PM

Sat, Oct 17 · KST

Best Meeting Times Between San Francisco and Seoul

No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 3:00 PM in San Francisco, which is 7:00 AM in Seoul; consider splitting into two shorter meetings or shifting someone's hours.

Who's meeting

2 of 4 places

San FranciscoOrganizerUnited States ·· summer time5:16AMnow
SeoulSouth Korea ·9:16PMnow

Add a city

Add up to 4 places by city, country, time zone or abbreviation, like Tokyo, India or JST. Press "/" to jump here.

Date in San Francisco

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in San Francisco time.

3:00PMBest · GoodWorking hours in San Francisco (15:00); just outside working hours in Seoul (07:00, next day).
4:00PMOption 2 · GoodWorking hours in San Francisco (16:00); just outside working hours in Seoul (08:00, next day).
5:00PMOption 3 · GoodWorking hours in Seoul (09:00, next day); just outside working hours in San Francisco (17:00).

The whole day

Pick any slot in the Fit row, or use the arrow keys there, to make it the meeting time.

Each column is a one-hour slot of the first place's day. The Fit row grades how well the slot suits everyone; each row shows the local time and whether it's working hours there.
Fit
San FranciscoPDT
SeoulUTC+9
UTC	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06

Working hours (09–17)Just outside (07–09, 17–20)Late evening (20–23)NightFit: optimal, good, possible, poor

Your meeting

San Francisco3:00 PM PDTSat, Oct 17
Seoul7:00 AM UTC+9Sun, Oct 18
UTC2026-10-17 22:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between San Francisco and Seoul

Seoul is 16 hours ahead of San Francisco right now: Seoul is on KST (UTC+9) and San Francisco on PDT (UTC-7). That changes on Sun, Nov 1, when clocks go back in San Francisco: then Seoul is 17 hours ahead of San Francisco.

Time difference between San Francisco and Seoul over the next 12 months
From	Difference	Why
Now	Seoul 16 hours ahead	—
Sun, Nov 1	Seoul 17 hours ahead	Clocks go back in San Francisco
Sun, Mar 14, 2027	Seoul 16 hours ahead	Clocks go forward in San Francisco

San Francisco is on Pacific Standard Time. Seoul is on Korean Standard Time.

Frequently Asked Questions: San Francisco & Seoul Scheduling

What is the time difference between San Francisco and Seoul?: Seoul is 16 hours ahead of San Francisco right now: Seoul is on KST (UTC+9) and San Francisco on PDT (UTC-7). That changes on Sun, Nov 1, when clocks go back in San Francisco: then Seoul is 17 hours ahead of San Francisco.
What is the best time to schedule a meeting between San Francisco and Seoul?: No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 3:00 PM in San Francisco, which is 7:00 AM in Seoul; consider splitting into two shorter meetings or shifting someone's hours.
Does San Francisco observe daylight saving time?: Yes. San Francisco is on PDT (UTC-7) now, and its clocks go back 1 hour on Sun, Nov 1, to PST (UTC-8).
Does Seoul observe daylight saving time?: No. Seoul stays on KST (UTC+9) all year, so its clocks don't change.
What time is it in Seoul when it's 9 AM in San Francisco?: 1:00 AM in Seoul, the next day (Sun, Oct 18, when it's Sat, Oct 17 in San Francisco).

Or see every city pair, or plan with more places in the meeting planner.