World Clock & Time Zone Converter
Check world clock times, convert between time zones, and plan meetings across cities.
Your local time —
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Beijing
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Tokyo
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London
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New York
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Los Angeles
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Sydney
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Paris
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Dubai
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Moscow
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Mumbai
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Singapore
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São Paulo
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Add timezone
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Frequently asked questions
How does the world clock work?⌄
Shows your local time plus live times for popular cities with UTC offset and day/night indicator. Uses browser timezone data, auto-updating.
How is timezone conversion done?⌄
Computes offset between two timezones using browser IANA timezone database. Correctly handles DST — New York↔London is 5h in winter, 4h in summer.
What business hours does the meeting planner use?⌄
Looks for 9:00 AM – 5:00 PM overlap across selected timezones. Shows UTC window if overlap exists, or reports no overlap.
Does the tool handle Daylight Saving Time?⌄
Yes — all calculations use the browser's up-to-date IANA timezone database, which includes DST rules for every region. DST transitions are automatically reflected.