San Francisco to Seoul: time difference and best times to meet
Seoul is 17 hours ahead of San Francisco. Their working days overlap for 2 hours, from 4pm to 6pm in San Francisco (9am–11am in Seoul). The best time to schedule is 4pm San Francisco time, which is 9am in Seoul.
America/Los_Angeles
Asia/Seoul
San Francisco and Seoul time difference
This live comparison uses the current time-zone rules for both cities, so it reflects daylight-saving changes as well as the usual San Francisco and Seoul clock gap. Set your working hours below to see the practical overlap before proposing a meeting.
Hour-by-hour overlap
Each row is one hour of the San Francisco day and the matching hour in Seoul. Adjust the working hours to match how your team actually works.
| San Francisco | Seoul | Suitable? |
|---|---|---|
| 12am | 5pm | Working hours in Seoul only |
| 9am | 2am | Working hours in San Francisco only |
| 10am | 3am | Working hours in San Francisco only |
| 11am | 4am | Working hours in San Francisco only |
| 12pm | 5am | Working hours in San Francisco only |
| 1pm | 6am | Working hours in San Francisco only |
| 2pm | 7am | Working hours in San Francisco only |
| 3pm | 8am | Working hours in San Francisco only |
| 4pm | 9am | Both cities at work |
| 5pm | 10am | Both cities at work |
| 6pm | 11am | Working hours in Seoul only |
| 7pm | 12pm | Working hours in Seoul only |
| 8pm | 1pm | Working hours in Seoul only |
| 9pm | 2pm | Working hours in Seoul only |
| 10pm | 3pm | Working hours in Seoul only |
| 11pm | 4pm | Working hours in Seoul only |
Best times to propose
- 1. 4pm in San Francisco · 9am in Seoul — Right at the edge of someone's day
- 2. 5pm in San Francisco · 10am in Seoul — Right at the edge of someone's day
Avoid 12am San Francisco time and 9am San Francisco time — only the other city is at work.
When the gap changes in the next twelve months
- Sunday, March 14, 2027 — Seoul goes from 17 hours ahead of to 16 hours ahead of San Francisco.
Recurring meetings set as a fixed clock time in one city will move by an hour for the other on that date.
Public holidays to avoid
Dates where one side is off work while the other is not are the most common cause of no-shows on this route.
- Wednesday, November 11, 2026 — Veterans Day — San Francisco is off, Seoul is working.
- Thursday, November 26, 2026 — Thanksgiving Day — San Francisco is off, Seoul is working.
- Friday, December 25, 2026 — Christmas Day and Christmas Day; both cities are off.
With 2 shared working hours, San Francisco and Seoul can run standing meetings without anyone giving up an evening — as long as the slot sits inside that window on both sides of the next clock change.
Sending a booking link avoids the arithmetic entirely: each side picks a time in their own zone and both calendars get the correct local time, including after a daylight-saving change. See how LemCall handles cross-timezone bookings.
Frequently asked questions
- What is the time difference between San Francisco and Seoul?
- Seoul is currently 17 hours ahead of San Francisco. That changes to 16 hours ahead of on Sunday, March 14, 2027, when one side shifts for daylight saving.
- When is the best time to schedule a meeting between San Francisco and Seoul?
- 4pm in San Francisco, which is 9am in Seoul. Right at the edge of someone's day.
- How many hours do San Francisco and Seoul overlap?
- 2 hours, from 4pm to 6pm San Francisco time (9am–11am in Seoul).
- Does daylight saving change the San Francisco–Seoul gap?
- Yes. Over the next twelve months the difference changes 1 time: Sunday, March 14, 2027 (17 hours ahead of becomes 16 hours ahead of).
- Are there public holidays that affect San Francisco–Seoul meetings?
- Yes. The next is Wednesday, November 11, 2026 — a public holiday where San Francisco is, but a normal working day in Seoul.
Nearby pairs
Other meeting-time pages for San Francisco
- San Francisco ↔ Sydney4 hours of overlap
- San Francisco ↔ Melbourne4 hours of overlap
- San Francisco ↔ London1 hours of overlap
- San Francisco ↔ Dublin1 hours of overlap
- San Francisco ↔ Singapore1 hours of overlap
- San Francisco ↔ Hong Kong1 hours of overlap
- San Francisco ↔ Shanghai1 hours of overlap
- San Francisco ↔ Tokyo2 hours of overlap
Sources
- 1.IANA. Time Zone Database
- 2.Nager.Date. Public holidays API · Retrieved