Meeting time

Best time to meet: San Francisco and Seoul

San Francisco is 17 hours behind Seoul right now. Their working days overlap for 1 hour: 4 PM to 5 PM in San Francisco, which is 9 AM to 10 AM in Seoul. The easiest time to meet is 4 PM in San Francisco (9 AM in Seoul).

Tue 7:59 AMSan Francisco · Pacific Standard TimeWed 12:59 AMSeoul · Korean Standard Time
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Hour by hour

With the clocks as they are on November 10, 2026, San Francisco time on the left. A working day here is 9 AM to 5 PM.

San FranciscoSeoul
6 AM11 PMBoth off
7 AM12 AM next dayBoth off
8 AM1 AM next dayBoth off
9 AM2 AM next daySan Francisco at work
10 AM3 AM next daySan Francisco at work
11 AM4 AM next daySan Francisco at work
12 PM5 AM next daySan Francisco at work
1 PM6 AM next daySan Francisco at work
2 PM7 AM next daySan Francisco at work
3 PM8 AM next daySan Francisco at work
4 PM9 AM next dayEasiest time
5 PM10 AM next daySeoul at work
6 PM11 AM next daySeoul at work
7 PM12 PM next daySeoul at work
8 PM1 PM next daySeoul at work
9 PM2 PM next daySeoul at work
10 PM3 PM next daySeoul at work

When the clocks change

The gap moves when either city changes its clocks. The next twelve months:

DatesSan Francisco isBoth at work (San Francisco time)Easiest (San Francisco / Seoul)
Now to March 14, 202717 hours behind4 PM–5 PM (1 hour)4 PM / 9 AM
March 14, 2027 to November 7, 2027
clocks in San Francisco go forward		16 hours behindNone4:30 PM / 8:30 AM
November 7, 2027 onward
clocks in San Francisco go back		17 hours behind4 PM–5 PM (1 hour)4 PM / 9 AM

Seoul keeps the same clock as Tokyo.

Questions people ask

What time is it in Seoul when it is 9 AM in San Francisco?
2 AM in Seoul, the next day, while San Francisco is 17 hours behind.
When is the best time for a call between San Francisco and Seoul?
4 PM in San Francisco, which is 9 AM in Seoul. Both cities are at work from 4 PM to 5 PM San Francisco time.
Does the time difference between San Francisco and Seoul change during the year?
Yes — it changes 2 times in the next twelve months, when the clocks go forward or back; the dates are in the table above.

More cities

New York and San Francisco5 hours of shared working day · meet at 1:30 PM New York timeLondon and San FranciscoNo shared working hours · fairest at 4:30 PM London timeSan Francisco and BangaloreNo shared working hours · fairest at 6 PM San Francisco timeSan Francisco and SingaporeNo shared working hours · fairest at 4:30 PM San Francisco timeSan Francisco and Sydney3 hours of shared working day · meet at 3 PM San Francisco timeSan Francisco and Tokyo1 hour of shared working day · meet at 4 PM San Francisco timeSan Francisco and BerlinNo shared working hours · fairest at 8 AM San Francisco timeSan Francisco and Chicago6 hours of shared working day · meet at 11:30 AM San Francisco timeSan Francisco and DubaiNo shared working hours · fairest at 6:30 AM San Francisco timeSan Francisco and ParisNo shared working hours · fairest at 8 AM San Francisco timeSan Francisco and Toronto5 hours of shared working day · meet at 10:30 AM San Francisco timeSan Francisco and MumbaiNo shared working hours · fairest at 6 PM San Francisco time

Every city from San Francisco · Every city from Seoul · All cities · Plan across more than two cities

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