Time Zone Calculator
Convert time between major world cities and time zones. Plan meetings and calls across different time zones easily.
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About Time Zone Conversion
Converting time between zones can be confusing due to Daylight Saving Time (DST) rules, which vary by country and region. This calculator uses your browser's built-in time zone database (IANA) to ensure accurate conversions for any date, past or future.
Common Time Zone Abbreviations
- UTC: Coordinated Universal Time. The primary time standard by which the world regulates clocks.
- GMT: Greenwich Mean Time. Often interchangeable with UTC but technically a time zone.
- EST/EDT: Eastern Standard/Daylight Time (New York, Toronto).
- PST/PDT: Pacific Standard/Daylight Time (Los Angeles, Vancouver).
- CET/CEST: Central European Time (Paris, Berlin).
Handling Daylight Saving Time
When you select a future date, this calculator automatically checks if DST will be in effect in the source or target location and adjusts the time accordingly. For example, the time difference between London and New York changes by one hour for a few weeks in Spring and Autumn because they switch their clocks on different dates.
? Frequently Asked Questions
Yes. It uses the specific date you enter to determine if DST is active in either the source or target location.
For most practical purposes, they are the same time. UTC is a time standard, while GMT is a time zone used in the UK and Africa. GMT observes daylight saving (switching to BST), whereas UTC never changes.
If the time difference is significant (e.g., USA to Australia), the converted time might cross midnight, landing on the next day (+1) or previous day (-1).