🕐 Time Zone Converter
Convert time between 30+ time zones. Pick a date and time, select the source and target zones, and get instant results.
Select a date/time and zones above
🌍 World Clocks
Understanding Time Zones
The world is divided into 24 primary time zones, each roughly 15° of longitude wide. UTC (Coordinated Universal Time) is the global time standard from which all zones are offset. Some zones use half-hour or 45-minute offsets (e.g., India at UTC+5:30, Nepal at UTC+5:45).
Common Time Zone Offsets
| Abbreviation | Name | UTC Offset |
|---|---|---|
| UTC / GMT | Coordinated Universal Time | +0:00 |
| IST | India Standard Time | +5:30 |
| EST | Eastern Standard Time | −5:00 |
| CST | Central Standard Time | −6:00 |
| PST | Pacific Standard Time | −8:00 |
| CET | Central European Time | +1:00 |
| JST | Japan Standard Time | +9:00 |
| AEST | Australian Eastern Standard Time | +10:00 |
| SGT | Singapore Time | +8:00 |
Daylight Saving Time (DST)
Many countries adjust clocks by 1 hour during summer months. This converter uses the IANA time zone database built into your browser, which automatically accounts for DST transitions. Always specify the city/region rather than just an abbreviation for accurate DST handling.
Frequently Asked Questions
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) share the same time in practice, but UTC is the modern standard based on atomic clocks, while GMT is the historical time zone based on solar time at Greenwich, England. UTC is used in technical contexts; GMT is colloquial.
India chose a single time zone at UTC+5:30 to cover its large east-west span. The 30-minute offset was selected as a compromise between Kolkata (east) and Mumbai (west) times, representing approximately the geographic centre of the country.
Yes. It uses the IANA time zone database built into your browser's JavaScript engine, which includes historical and current DST rules. If you select a zone like "America/New_York," DST is automatically applied for the selected date.