What is the time difference between Seoul and San Francisco?

Seoul is UTC+9 year-round. San Francisco is UTC−8 (PST) in winter and UTC−7 (PDT) in summer. The gap is 17 hours in winter and 16 hours in summer.

What is the best meeting time for Seoul and San Francisco?

The most practical window is 5–6 PM San Francisco / 9–11 AM Seoul the next day. SF closes out the day with the call; Seoul starts its morning with it. The gap means these will always fall on different calendar days.

Does South Korea observe daylight saving time?

No. South Korea uses Korean Standard Time (KST) at a fixed UTC+9, the same offset as Japan. South Korea abolished DST in 1988. The gap with San Francisco changes only when the US transitions between PST and PDT.

Best Meeting Times Between Seoul and San Francisco

August 29, 2026

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Frequently Asked Questions

What is the time difference between Seoul and San Francisco?: Seoul is UTC+9 year-round. San Francisco is UTC−8 (PST) in winter and UTC−7 (PDT) in summer. The gap is 17 hours in winter and 16 hours in summer.
What is the best meeting time for Seoul and San Francisco?: The most practical window is 5–6 PM San Francisco / 9–11 AM Seoul the next day. SF closes out the day with the call; Seoul starts its morning with it. The gap means these will always fall on different calendar days.
Does South Korea observe daylight saving time?: No. South Korea uses Korean Standard Time (KST) at a fixed UTC+9, the same offset as Japan. South Korea abolished DST in 1988. The gap with San Francisco changes only when the US transitions between PST and PDT.