Time zone converter and world clock
Compare time in multiple cities on one shared timeline, move a single cursor through the day, and account for daylight saving changes on the selected date.
Use this page when the real task is finding a meeting time that works across Prague, New York, Tokyo, London, and other cities without juggling several clocks manually.
The tool is built around one absolute instant that is rendered into every selected IANA time zone, so DST and date rollover are handled for the exact day you are planning.
Saved cities, date, format, and cursor position can follow you through browser storage, account sync, and a shareable URL when you want the same view on another device or for another person.
World Clock
Time zone converter and meeting planner
Compare cities on one shared timeline, move a single cursor through the day, and keep the same view in your browser, account, and URL.
Reference time
23:21
Prague, Czechia / Mar 19
Selected cities
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Prague
Home23:21
Thu, Mar 19
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New York
18:21
Thu, Mar 19
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Tokyo
07:21
Fri, Mar 20
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Shared timeline
Drag the bar to move all cities together
23:21
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Prague
HomeUTC+1Czechia / GMT+1
23:21
Thu, Mar 19
Now: 23:21
New York
UTC-4United States / EDT
18:21
Thu, Mar 19
Now: 18:21
Tokyo
UTC+9Japan / GMT+9
07:21
Fri, Mar 20
Now: 07:21
Next day
FAQs
Why use IANA time zones instead of fixed UTC offsets?
Because the same city can switch offsets by date. A real zone like Europe/Prague or America/New_York is the only reliable way to handle DST and transition days.
What happens on the day DST starts or ends?
The converter keeps one absolute instant and shows a clear note if the chosen local wall time falls into a skipped or repeated hour.
Can I save my city set and settings?
Yes. Guest users keep the view in localStorage, and authenticated users sync the same state to the database.
Can I share the exact same view?
Yes. The URL stores the selected cities, reference zone, date, format, and timeline cursor so the same setup can be restored by link.
What is this most useful for?
It works best for meeting planning, support coverage, distributed team coordination, and any scenario where you need to compare several cities side by side on one day.
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