Free World Clock — See Every Timezone at a Glance
Compare times across 400+ cities and 195 countries. Drag any slider and every clock stays in sync — no sign-up, no servers, no lag.
What is a world clock?
A world clock displays the current time across multiple timezones simultaneously. Instead of converting each timezone individually, you see them all side by side — making it easy to find meeting times that work for everyone on your team.
tyme takes this a step further. Instead of showing static times, every clock has a draggable slider. Move one clock forward or backward and every other timezone updates instantly. You can scan the entire day to find the overlap that works for San Francisco, London, and Tokyo — without doing any math.
Why use tyme as your world clock
Synced sliders
Drag any clock to any hour and watch every timezone update in real time.
400+ timezones
Every entry in the IANA timezone database, from New York to Tokyo to Auckland.
Day and night indicators
Colored icons show who's awake and who's asleep at any given hour.
No sign-up required
Open the web app and start adding clocks immediately — no account, no email.
Works offline
All timezone calculations happen locally in your browser using the Intl API.
Accurate DST handling
Daylight saving time transitions are applied automatically for every city.
How to use the world clock
- 1
Open the web app
Head to the tyme web app — no download or sign-up needed.
- 2
Add your cities
Search for the cities your team works across and add them in one click.
- 3
Drag any slider
Scrub through the day on any clock to see how times align across timezones.
- 4
Find the overlap
Day and night indicators help you spot the hours where everyone is awake.
World clock questions
Ready to see every timezone at once?
Open the tyme web app and add your first clocks in seconds.