Time Zone Converter
Convert time between any two time zones.
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Time Difference
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Frequently Asked Questions
How do time zones work?
The world is divided into 24 time zones, each roughly 15° of longitude. UTC (Coordinated Universal Time) is the reference point.
What is UTC?
UTC (Coordinated Universal Time) is the primary time standard. It's essentially the same as GMT but more precisely defined.
What about daylight saving time?
DST shifts clocks forward 1 hour in spring and back in fall. Not all regions observe it. This calculator uses standard offsets.
Why do some zones have :30 offsets?
India (UTC+5:30), Iran (UTC+3:30), and others use half-hour offsets for geographical or political reasons.
What is the International Date Line?
An imaginary line at roughly 180° longitude where the calendar date changes. Crossing westward adds a day; eastward subtracts one.