Time Zone Converter
Convert a date and time between any two time zones. Handles Daylight Saving Time automatically via the IANA time zone database. Quick reference: current time in New York, London, Tokyo, Sydney, and Los Angeles.
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Frequently asked questions
Does this tool handle Daylight Saving Time?
Yes. The conversion uses the IANA Time Zone Database (tzdata) via your browser's Intl.DateTimeFormat API, which knows the DST rules for every region. When you pick a date and time, the converter checks whether DST is in effect at that specific moment in each zone and applies the correct offset. Note that some countries (Russia, Iceland, most of Asia and Africa, Arizona, Hawaii) do not observe DST.
What is UTC?
UTC (Coordinated Universal Time) is the world's primary time standard — the reference from which all civil time zones are offset. It does not observe Daylight Saving Time. Aviation, computing, scientific timestamps, and international protocols (HTTP, SMTP, RSS) all standardize on UTC. UTC is identical to GMT for most practical purposes, though GMT technically refers to mean solar time at the Royal Observatory in Greenwich, while UTC is defined by atomic clocks.
How many time zones are there?
Civil time has 38 distinct UTC offsets currently in use, ranging from UTC−12:00 (Baker Island) to UTC+14:00 (Kiribati/Line Islands). Some zones use 15- or 30-minute offsets — India is UTC+5:30, Nepal is UTC+5:45, parts of Australia are UTC+8:45 (Eucla) and UTC+9:30 (Adelaide). The IANA database catalogs ~600 named zones, but many share the same offset and DST rules.