Does my data get uploaded, or does it run in my browser?

Nothing is uploaded. All offset math and formatting run in your browser through the native Intl.DateTimeFormat API, which reads the IANA database built into your operating system. No time data is sent to a server, so the tool keeps working offline once the page loads.

How does the converter handle Daylight Saving Time?

It pivots through UTC. When you enter a wall-clock time in the source zone, the tool finds that zone's offset at that exact moment — including DST if it was active on that date — to compute the true UTC instant, then applies the target zone's offset at the same instant. This converts April rates against winter rates across zones with different DST schedules correctly, with no manual arithmetic.

What does a UTC offset like +05:30 mean?

A UTC offset is how far ahead (+) or behind (−) a region is from Coordinated Universal Time. New York is UTC−05:00 in winter and UTC−04:00 in summer; India is a fixed UTC+05:30 with no DST. UTC itself never shifts — it is the atomic-clock reference behind GPS and internet protocols — so always convert through it: source time → UTC instant → target time.

How many time zones are in the dropdown and why so many?

Release 2026b of the IANA database holds roughly 350 canonical zones plus alias links, because boundaries follow political subdivisions, not just longitude. The US state of Indiana spans multiple zones because some counties opted out of DST, and many entries are backward-compatibility aliases. Type a city name to filter the list to its zone.

What happens if I enter a time that does not exist, like 2:30 AM on a spring-forward day?

Spring-forward skips an hour: US clocks jump from 1:59:59 straight to 3:00:00, so 2:30 AM literally never occurs that night. The converter resolves a nonexistent wall time by using the offset it computes for that instant, which rolls the result forward into the post-transition hour rather than throwing an error. Fall-back duplicates an hour instead, so 1:30 AM occurs twice.

How is this different from converting a timestamp in plain JavaScript?

A plain Date object stores a UTC instant, but its string output depends on the runtime's local zone, which varies per user. This converter lets you set both source and target zones explicitly, decoupling the result from your system clock. Internally it uses Intl.DateTimeFormat with the timeZone option — the same engine date-fns-tz and Luxon rely on.

How do I pick a meeting time across a global team?

Add each member's city to the world clock board and scan the row for an hour that is reasonable everywhere (roughly 8 AM to 6 PM local). For zones spanning 9+ hours, like San Francisco, London, and Mumbai, there is rarely a slot comfortable for all — rotate the inconvenience across recurring meetings. Each tile shows day-of-week too, which matters across the date line.

Time Zone Converter With Live World Clock & DST Status

Q: Is this time zone converter free?

Yes. The converter and the live world clock are 100% free with no signup and no usage cap. Every IANA zone your browser ships with is available, and there is nothing to install.

Q: Why use IANA names like America/New_York instead of EST or PST?

Because abbreviations are ambiguous and DST-coupled. "CST" can mean US Central, China Standard, or Cuba Standard Time, and "EST" versus "EDT" already bakes in whether DST is active. IANA names like America/New_York stay constant year-round while the offset shifts internally, so they are the only safe identifier in code. This tool loads the full IANA list via Intl.supportedValuesOf("timeZone").

Convert a specific time between any two IANA time zones, or scan a live world-clock board of nine cities at once. DST-aware UTC offsets, a 12/24-hour toggle, and ISO 8601 output. Free, no signup, and 100% in your browser.

Convert Specific Time

12-hour format

From

Now in UTC:

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UTC offset —

Live World Clock

Los Angeles