Overlap Clock

Plan meetings across time zones by looking at one clock

Overlap Clock puts your local time in the middle and every city you work with on a ring around it. Each ring is colored during that city's working hours. Where the colors line up, everyone is at work, and that's when to meet.

Open Overlap Clock Free. No account.

Overlap Clock at 17:05 in Tel Aviv: the New York, London and Tel Aviv rings are all colored, showing those three cities are in working hours together, while San Francisco and Sydney are outside theirs

How to find a meeting time

  1. Add the cities

    Add a city for each person you meet with, and pick its color and its working hours (Start and End). Under Manage locations you can drag cities into a new order, set which one is home, or remove one.

  2. Look for where the colors line up

    Each city's color is drawn on its ring only between the Start and End hours you set, so the colored part of a ring is that city's working day. The stretch where every ring is colored is the time your whole group is at work.

  3. Pick a time

    Drag around the clock, or use the arrow keys, to move every city's time at once. Or press Find overlap to jump to the next time when the most cities are at work together.

  4. Put it on the calendar

    Schedule the meeting and it's added to your Google Calendar after you sign in with Google. Overlap Clock creates that one event and never reads the rest of your calendar.

The Add location panel: a city search box, a row of color swatches with a custom hex color, and Start and End fields set to 9 and 18
Each city's color and working hours, set when you add it.
The Manage locations panel listing Tel Aviv (marked as home), Sydney, London, New York and San Francisco, each with its color, a drag handle and a delete button
Reorder cities, change home, or remove one.

Share your clock with one button

Press the Share button and you get a link to your exact clock. Whoever opens it sees the same cities and the same hours you do, with nothing to install and no account to make.

Overlap Clock's menu opened in the top-right corner, with the Share button highlighted between the Config and Close buttons

Who uses it

Remote teams spread across continents, freelancers with clients abroad, and anyone trying to find a reasonable hour to call family in another country.

Free and open source

Overlap Clock is free, needs no account, and its code is on GitHub under the MIT license. The developer doesn't run a server that stores your cities or hours. The privacy policy lists exactly what the app touches.

Overlap Clock for Chrome

The Chrome extension puts the same clock in your browser toolbar, one click away from any tab. It has its own Share button, and a button that opens your clock in the full web app, which is where Google Calendar scheduling happens.

Add to Chrome

Open Overlap Clock