Time Zone Converter
Convert a time from one zone to another. Uses fixed UTC offsets; does not account for current DST transitions in all zones.
Inputs
Time in target zone
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Time difference
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Day shift
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Source UTC offset
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Target UTC offset
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About Time Zone Converter
DST awareness
This calculator uses your browser\u2019s Intl API, which reflects current DST rules. A time on a different date may have a slightly different offset if it falls on the other side of a DST transition.
UTC and GMT
GMT is a time zone (London winter time). UTC is a global standard. They are usually identical in number but UTC is the technical reference. Always use UTC for code, logs, APIs.
IST ambiguity
IST means "India Standard Time" (UTC+5:30), "Irish Standard Time" (UTC+1, summer), or "Israel Standard Time" (UTC+2). Always spell out the country for clarity.