Meridian

San Francisco and London meeting times

Where the working days of San Francisco and London overlap, and when daylight saving moves it.

    Clock change heads-up

    One email a week before the clocks change in your cities, with the new gaps. Nothing else.

    Calling between San Francisco and London

    For most of the year London is 8 h ahead of San Francisco.

    With both sides working 9:00 to 17:00 there is no hour when both are at work. The kindest slot is 07:00–14:00 in San Francisco, which is 15:00–22:00 in London, when both are awake and one side is at work.

    Watch the clock changes. San Francisco and London don't change on the same day, so in 2027 the gap is 7 h instead of 8 h from 14 Mar to 27 Mar and from 31 Oct to 6 Nov. Meetings booked by habit land an hour off in those weeks.

    At a glance (January)

    1. 08:00 in San Francisco16:00 in London
    2. 09:00 in San Francisco17:00 in London
    3. 12:00 in San Francisco20:00 in London
    4. 15:00 in San Francisco23:00 in London
    5. 17:00 in San Francisco01:00 in London, next day
    A brass sundial casting a long shadow on paper, with indigo, lilac and yellow paper dots and a red pencil

    Questions

    Does it handle daylight saving time?

    Yes. Every time is worked out for the date you pick, using your browser's own time zone rules. Pick a date in March or October and the rings move to match, including the odd weeks when Europe and North America change on different Sundays.

    Can I set different working hours for each person?

    Tap anyone's row to set their hours, rename them or make them the home city. Night shifts that run past midnight work too.

    What if there's no time when everyone is at work?

    Meridian says so, then finds the closest thing: a stretch when everyone is at least awake, with as many people at work as possible.

    How do I send the time to everyone?

    Copy times gives you one line with the time in every city, ready to paste into a chat or invite. Add to calendar downloads an invite file, and Share link opens the same dial on someone else's phone.

    Do I need an account?

    No. Your cities and hours stay on this device. We count page views without cookies.

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