San Francisco to Seoul: time difference and best times to meet
Seoul is 16 hours ahead of San Francisco. Their working days overlap for 1 hour, from 5pm to 6pm in San Francisco (9am–10am in Seoul). The best time to schedule is 5pm San Francisco time, which is 9am in Seoul.
America/Los_Angeles
Asia/Seoul
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 | 4pm | Working hours in Seoul only |
| 1am | 5pm | Working hours in Seoul only |
| 9am | 1am | Working hours in San Francisco only |
| 10am | 2am | Working hours in San Francisco only |
| 11am | 3am | Working hours in San Francisco only |
| 12pm | 4am | Working hours in San Francisco only |
| 1pm | 5am | Working hours in San Francisco only |
| 2pm | 6am | Working hours in San Francisco only |
| 3pm | 7am | Working hours in San Francisco only |
| 4pm | 8am | Working hours in San Francisco only |
| 5pm | 9am | Both cities at work |
| 6pm | 10am | Working hours in Seoul only |
| 7pm | 11am | Working hours in Seoul only |
| 8pm | 12pm | Working hours in Seoul only |
| 9pm | 1pm | Working hours in Seoul only |
| 10pm | 2pm | Working hours in Seoul only |
| 11pm | 3pm | Working hours in Seoul only |
Best times to propose
- 1. 5pm in San Francisco · 9am in Seoul — Right at the edge of someone's day
Avoid 12am San Francisco time and 1am San Francisco time — only the other city is at work.
When the gap changes in the next twelve months
- Sunday, November 1, 2026 — Seoul goes from 16 hours ahead of to 17 hours ahead of San Francisco.
- 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 these dates.
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.
- Thursday, September 24, 2026 — Chuseok — Seoul is off, San Francisco is working.
- Friday, September 25, 2026 — Chuseok — Seoul is off, San Francisco is working.
- Saturday, September 26, 2026 — Chuseok — Seoul is off, San Francisco is working.
- Monday, October 5, 2026 — National Foundation Day — Seoul is off, San Francisco is working.
- Friday, October 9, 2026 — Hangul Day — Seoul is off, San Francisco is working.
- Monday, October 12, 2026 — Indigenous Peoples' Day — San Francisco is off, Seoul is working.
- 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 1 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 16 hours ahead of San Francisco. That changes to 17 hours ahead of on Sunday, November 1, 2026, when one side shifts for daylight saving.
- When is the best time to schedule a meeting between San Francisco and Seoul?
- 5pm 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?
- 1 hours, from 5pm to 6pm San Francisco time (9am–10am in Seoul).
- Does daylight saving change the San Francisco–Seoul gap?
- Yes. Over the next twelve months the difference changes 2 times: Sunday, November 1, 2026 (16 hours ahead of becomes 17 hours ahead of); 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 Thursday, September 24, 2026 — a public holiday where Seoul is, but a normal working day in San Francisco.
Nearby pairs
Other meeting-time pages for San Francisco
- San Francisco ↔ SingaporeNo working-hours overlap
- San Francisco ↔ Hong KongNo working-hours overlap
- San Francisco ↔ ShanghaiNo working-hours overlap
- San Francisco ↔ Sydney2 hours of overlap
- San Francisco ↔ Melbourne2 hours of overlap
- San Francisco ↔ London1 hours of overlap
- San Francisco ↔ Dublin1 hours of overlap
- San Francisco ↔ Tokyo1 hours of overlap
Sources
- 1.IANA. Time Zone Database
- 2.Nager.Date. Public holidays API · Retrieved