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Featured cities on the fullscreen world clock
The default view keeps eight clear city clocks—Beijing, Tokyo, Singapore, London, Paris, New York, Los Angeles, and Sydney. Open Manage cities to add Toronto, Bangkok, and other places without turning the first screen into a dense wall of clocks.
- BeijingChina · Asia/Shanghai
- TokyoJapan · Asia/Tokyo
- SingaporeSingapore · Asia/Singapore
- LondonUnited Kingdom · Europe/London
- ParisFrance · Europe/Paris
- New YorkUnited States · America/New_York
- Los AngelesUnited States · America/Los_Angeles
- SydneyAustralia · Australia/Sydney
Fullscreen world clock with live map and city times
Use this free fullscreen world clock as a digital world time display for classrooms, projectors, and desktop screens. Compare live local times across cities, read UTC offsets and relative differences, and check the world clock map for day-and-night context before you schedule a remote class or cross-time-zone meeting.
Fullscreen world clock for screens and projectors
- Enter full screen to hide chrome and keep the map plus city clocks large enough for a classroom screen, spare monitor, or shared desktop display.
- Times update live from your browser’s time-zone data, so the board stays current during a lesson or planning session.
- When the browser supports it, screen wake lock helps the fullscreen world clock stay visible instead of dimming mid-class.
Understand world time, UTC, and GMT
- UTC is the shared reference for world time conversion. GMT is often used interchangeably in everyday schedules, while UTC is the modern time standard.
- Every city uses an IANA time-zone identifier, so the clock follows current regional rules instead of a permanently stored fixed offset.
- Countries such as the United States, Canada, Mexico, Brazil, Russia, Indonesia, and Australia use multiple representative cities because one national time would be misleading.
World clock map with day and night
The curved boundary on the world clock map is the solar terminator. It separates daylight and night and changes shape through the seasons.
Pair the map with each city’s local time and day label. A modest numerical offset can still place another classroom or meeting partner outside comfortable working hours.
Compare cities for classes and meetings
- Before a remote lesson or international call, check whether New York, London, Tokyo, Toronto, or Sydney is in daytime, evening, or the next calendar day.
- UTC badges and relative difference chips make it faster to spot who is ahead or behind without building a separate meeting-planner spreadsheet.
- Highlight the city you are discussing on the map and in the clock row so the whole room shares the same reference.
Daylight saving time and date changes
- DST labels update from the browser’s IANA time-zone data when a city moves between standard and daylight time.
- Crossing the International Date Line can move a city to the previous or next calendar day even when the clock difference feels modest.
- Today, Yesterday, and Tomorrow labels make the calendar difference explicit before you schedule a class or meeting.
How to use the fullscreen world clock
- Open Manage cities to add or remove locations from the first-screen clock row.
- Search by city, country, or an IANA time-zone name such as America/Toronto or Asia/Bangkok.
- Use Settings for 12/24-hour time, city sorting, and the day-night map layer.
- Use full screen when projecting or leaving the world clock on a desktop monitor; exit full screen to manage cities or change settings.
- Select a city card or map marker to keep the location you are discussing visually highlighted.
Related classroom tools
- TimerStart a classroom countdown with presets, projector mode, and wake lock.
- Flip ClockOnline flip clock with optional seconds and card styles for desks and classrooms.
- Digital ClockOnline digital clock with optional seconds, date, and display styles.
- StopwatchOnline stopwatch with laps, adjustable precision, and wake lock.
Fullscreen World Clock FAQ
- Is this a fullscreen world clock?
- Yes. Open full screen to enlarge the live world map and city clocks for a classroom projector, second screen, or desktop display. Navigation and page content stay hidden while full screen is active.
- Does the world clock include a map?
- Yes. The live world clock map shows selected cities with a day-night layer so you can see whether another location is in daylight or night while you compare local times.
- Can I use it to plan meetings across time zones?
- Yes for quick comparisons. Check live city times, UTC offsets, relative differences, and day labels before scheduling a remote class or call. It is not a full booking calendar, but it replaces ad-hoc world-time lookups.
- Does the world clock account for daylight saving time?
- Yes. Each city uses an IANA time-zone identifier, and applicable daylight-saving changes are calculated for the current date.
- Why can cities in one country show different times?
- Many countries span multiple time zones. ClassroomTimers models representative cities rather than assigning one misleading time to the entire country.
- Are my selected cities and display settings saved?
- Yes. City selections and ordinary display preferences are stored locally in this browser and do not require an account.
- Are UTC and GMT the same?
- They are usually interchangeable for everyday clock comparisons. UTC is the modern atomic time standard, while GMT is a historical solar-time reference.