How to Use a World Clock for Remote Meetings and Shared Screens

A world clock gives a shared screen one clear reference for local time and the few other cities that matter to a session. It is useful for remote meetings, distributed classes, international events, and any schedule that crosses timezones.

Open the world clock to see your browser-local time, choose a 12- or 24-hour display, and add relevant city clocks without using a timezone service.

Set up a useful world clock in four steps

1. Start with the large local clock as the main time reference.
2. Choose 12-hour or 24-hour time based on what your group normally reads.
3. Add only the cities where participants, presenters, or deadlines are based.
4. Show the date when the event is near midnight or crosses large timezone offsets.

Keep the list short. A display with three meaningful cities is faster to scan than a long list of places that do not affect the current event.

Choose cities for the people, not the map

Pick the locations that help people make a decision: the host’s city, the furthest participant’s city, the place where a deadline applies, or the city of an event. If a city does not change what someone needs to do, remove it from the shared view.

For example, a team in London, New York, and Singapore might show those three locations during a planning session. A teacher hosting an international class might show their own city plus the two regions with most participants. The goal is clarity, not a complete world atlas.

Read the date and offset, not just the hour

An hour alone can be misleading around midnight. World-clock cards show city name, local time, date context, and the signed offset relative to your browser’s local timezone. That helps make “tomorrow morning” and “late tonight” more obvious before people make plans.

When a meeting is important, confirm the displayed time before sending the invitation. A world clock is a clear reference, but the meeting platform’s invitation and calendar settings are still the place to confirm the official event details.

Daylight-saving time: what to check

Timezone offsets can change seasonally, and the change dates are not the same everywhere. Timer on Screen formats city time with the browser’s built-in internationalization support and a static city catalog, rather than fetching timezones from a remote service. Intl.DateTimeFormat is the web platform feature used to format date and time in a specified timezone.

For a high-stakes international event, check the display again near a daylight-saving transition. Do not assume an old offset is still correct just because a prior meeting used it.

Make a world clock readable on a shared screen

Use presentation mode when the clock is the main reference for a room or video call. Set the time format before sharing, keep the city list focused, and leave the date visible for sessions that span calendar days.

The display should answer three questions quickly: what time is it here, what time is it there, and is it the same calendar day? If people need to calculate availability or schedule a future meeting, use their calendar tools after reading the current reference.

A short pre-meeting time check

Before a cross-timezone session, compare the host location, the earliest participant location, and the latest participant location. Check whether any location is on a different date, then confirm that the calendar invitation agrees with the live reference. This small check is especially useful when an event falls near midnight or a daylight-saving transition.

During the session, keep only the clocks that change a decision. A focused display reduces the need for people to calculate offsets in their heads and makes it easier to spot when someone is joining outside ordinary hours.

Pair the clock with the online countdown timer guide when each part of the event needs a visible finish time. Read the Methodology for the local-first and accessibility principles behind the world clock.