World Clock
Compare the current time in any two time zones, with UTC offsets, time difference and daylight saving changes.
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About the World Clock
The World Clock compares the current time in two time zones side by side, with the time difference, UTC offsets, abbreviations and the next daylight saving change, plus a grid of clocks for other cities.
Times come from your browser’s built-in IANA time zone database, so daylight saving rules are always current.
How to use the World Clock
- Search for the current and target time zones by city, country, abbreviation or offset.
- Read both times, the difference and the next clock change.
- Set a date and time to convert a specific moment, or add cities to the world clock grid.
Frequently asked questions
Why does my city show as Asia/Kolkata and not Asia/Calcutta?
Asia/Kolkata is the current official name in the IANA time zone database; old names like Asia/Calcutta still work in search.
Is daylight saving time handled?
Yes. Offsets come from your browser's IANA database, so every DST rule and historic change is applied.
Related tools
Time Zone Converter
Convert a date and time between time zones with correct daylight saving handling, including gaps and overlaps.
Unix Timestamp Converter
Convert Unix epoch timestamps (seconds or milliseconds) to dates and back, in any time zone.
Date Difference Calculator
Calculate the exact difference between two dates in years, months, days, hours and business days.