9am in San Francisco is 5pm in London

When it’s 9am in London, it’s 2am in San Francisco. San Francisco is 7 hours behind London. During the weeks when North America and Europe switch clocks on different dates, the gap between London and San Francisco shifts by an hour temporarily. The best time to schedule calls between the two cities is 4pm to 6pm London time (which is 9am to 11am in San Francisco). Deal teams connecting London and San Francisco tend to schedule calls mid-morning in the earlier city, which lands in early afternoon for the other side. In practice, teams in San Francisco often take early-morning slots to connect with London during afternoon hours, while the London side tends toward end-of-day availability. Having a standing calendar slot for cross-city calls reduces back-and-forth over scheduling and keeps projects moving efficiently.