Seoul, South Korea
Sat, Jul 4, 2026 23:37
- Timezone
- Asia/Seoul
- UTC offset
- UTC+09:00
- Daylight saving
- No
Seoul and San Francisco Time Difference
Compare Seoul vs San Francisco time, current local times, UTC offset difference, daylight saving status, and the best time to plan meetings or travel.
Quick Answer
What is the time difference between Seoul and San Francisco?
The live comparison below shows both local times, current UTC offsets, daylight saving status, and whether San Francisco is ahead of or behind Seoul.
Current time difference
San Francisco, United States
Sat, Jul 4, 2026 07:37
- Timezone
- America/Los_Angeles
- UTC offset
- UTC-07:00
- Daylight saving
- Yes
Time difference
San Francisco is 16 hours behind Seoul
UTC offset difference
-16:00
Suggested call window
Sat, Jul 4, 08:00-10:00 / Fri, Jul 3, 16:00-18:00
Calculated using initiator awake hours of 08:00-23:00 and recipient office hours of 09:00-18:00.
Dynamic Time Difference
Seoul is 16 hours ahead of San Francisco
The difference changes during 2026 because Seoul keeps a fixed UTC offset and San Francisco changes UTC offset during the year. Jan 1-Mar 7: Seoul is 17 hours ahead of San Francisco; Mar 8-Oct 31: Seoul is 16 hours ahead of San Francisco; Nov 1-Dec 31: Seoul is 17 hours ahead of San Francisco.
Seoul
UTC+09:00 · No seasonal offset change detected
San Francisco
UTC-07:00 · Seasonal clock changes; DST is active now
Business Call Window
09:00-18:00 work-hour overlap
Both 09:00-18:00 workdays overlap. A practical window is 09:00-10:00 in Seoul, which is 17:00-18:00 in San Francisco.
Seoul: 09:00-10:00
San Francisco: 17:00-18:00
24-Hour Conversion Table
Seoul to San Francisco hourly time conversion
The table uses today's active UTC offsets. Seasonal rows can shift when daylight saving time changes.
| Seoul | San Francisco |
|---|---|
| 00:00 | 08:00 (previous day) |
| 01:00 | 09:00 (previous day) |
| 02:00 | 10:00 (previous day) |
| 03:00 | 11:00 (previous day) |
| 04:00 | 12:00 (previous day) |
| 05:00 | 13:00 (previous day) |
| 06:00 | 14:00 (previous day) |
| 07:00 | 15:00 (previous day) |
| 08:00 | 16:00 (previous day) |
| 09:00 | 17:00 (previous day) |
| 10:00 | 18:00 (previous day) |
| 11:00 | 19:00 (previous day) |
| 12:00 | 20:00 (previous day) |
| 13:00 | 21:00 (previous day) |
| 14:00 | 22:00 (previous day) |
| 15:00 | 23:00 (previous day) |
| 16:00 | 00:00 |
| 17:00 | 01:00 |
| 18:00 | 02:00 |
| 19:00 | 03:00 |
| 20:00 | 04:00 |
| 21:00 | 05:00 |
| 22:00 | 06:00 |
| 23:00 | 07:00 |
FAQ
What is the current time difference between Seoul and San Francisco?
Seoul is 16 hours ahead of San Francisco. This uses the active IANA timezone offsets for today.
When does the Seoul-San Francisco time difference change in 2026?
The difference changes during 2026 because Seoul keeps a fixed UTC offset and San Francisco changes UTC offset during the year. Jan 1-Mar 7: Seoul is 17 hours ahead of San Francisco; Mar 8-Oct 31: Seoul is 16 hours ahead of San Francisco; Nov 1-Dec 31: Seoul is 17 hours ahead of San Francisco.
What are the current UTC offsets for Seoul and San Francisco?
Seoul is currently UTC+09:00; San Francisco is currently UTC-07:00.
Which direction does the clock change when flying from Seoul to San Francisco?
Travelers from Seoul to San Francisco move their clock back by 16 hours.
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