Time zone converter
Convert a time from one zone to another (DST handled).
How to use the time zone converter
- The date & time field starts at the current moment, From starts on your own zone (detected automatically) and To starts on UTC — so the page answers “what's my time in UTC?” before you touch anything.
- Enter the date and time as it's expressed in the source zone — for “3 PM Pacific”, type 15:00 with From set to America/Los Angeles.
- Pick the target under To. The converted time updates instantly, formatted like Jul 11, 2026, 2:30 PM.
- Daylight saving is applied for the specific date you chose: the tool looks up the offset actually in force at that moment in each zone.
- Swap the From and To selections to convert in the opposite direction.
Common uses
- Schedule calls across offices — check what 9 AM in New York means in London, Kolkata or Tokyo before sending the invite.
- Convert event times announced in another zone: a webinar “at 3 PM Pacific”, a game unlocking at midnight Eastern, a kickoff listed in UTC.
- Coordinate deploys and maintenance windows announced in UTC with the local time of everyone on the team.
- Sanity-check a recurring meeting around DST switches, when the gap between two cities temporarily changes.
- Convert flight or hotel times from an itinerary that lists them in the destination's zone.
Tips & limitations
- Offsets change with the calendar: London is UTC+0 in winter and UTC+1 in summer, so always convert with the actual date instead of a memorized offset.
- The US and Europe don't switch DST on the same weekend — for a few weeks each spring and fall, New York to London is 4 hours instead of the usual 5. If a recurring call suddenly feels off by an hour, that's why.
- The list covers UTC, your detected zone and 17 major zones worldwide — there's no city search. If your city isn't listed, pick one sharing its zone: Toronto keeps New York time, and much of Western Europe matches Paris/Berlin.
- Times that don't exist (skipped by spring-forward) or occur twice (fall-back) are resolved to one valid reading automatically — double-check anything scheduled right at a switchover.
- Half-hour zones work correctly — India (Asia/Kolkata) sits at UTC+5:30, and the converter handles it like any other zone.
How it's built & why it's safe
Conversions use the browser's own Intl.DateTimeFormat engine and its bundled IANA time-zone database — the same rule set operating systems use. The tool computes the source zone's UTC offset at the chosen instant (with a second pass to settle dates that straddle a DST switch), then formats the result in the target zone. Your own zone is detected with Intl's resolvedOptions(). Nothing is downloaded or uploaded: the zone data ships inside your browser, so conversions work offline.
Related tools: Timestamp Converter · Age Calculator · Pomodoro Timer
Further reading: Unix timestamps and time zones, demystified
Frequently asked questions
Does it handle daylight saving time?
Yes. The offset is looked up per date from the browser's IANA time-zone database, so a January conversion and a July conversion between the same two zones can differ by an hour — as they should.
Why isn't my city in the list?
The dropdown offers a curated set: UTC, your own detected zone and 17 major zones covering the Americas, Europe, Africa, Asia and Oceania. Zones describe regions rather than single cities, so pick any listed city that keeps the same time as yours.
Why did my usual 5-hour gap become 4 hours?
Different regions change their clocks on different dates — the US switches in early March, Europe in late March, and the southern hemisphere goes the other way entirely. During those overlap weeks, familiar gaps between cities temporarily shrink or grow.
What's the difference between UTC and GMT?
In practice they show the same time: GMT is a time zone and UTC is the modern international time standard, both at offset zero. Technical schedules, logs and aviation use UTC; GMT survives mostly in everyday British usage.
What happens if I enter a time that doesn't exist, like 2:30 AM on a spring-forward night?
Clocks jump straight from 2:00 to 3:00 that night, so 2:30 never occurs. The converter resolves such times to a valid nearby instant automatically, but it's worth avoiding switchover hours for anything important.
How up to date are the time-zone rules?
As current as your browser: the IANA database ships with the browser and is refreshed by normal browser updates. Governments do occasionally change DST rules, so keeping your browser updated keeps conversions right.