See one instant in up to five cities, then drag the slider to move through time. DST jumps, half-hour zones and date-line flips are handled automatically.
You can compare up to 5 cities. The 24-hour strip marks 09:00-18:00 local time as daylight.
Days between dates, add & subtract.
Convert Unix timestamps to dates and back.
Build cron expressions, next 10 dates.
Built with privacy in mind. All processing happens entirely in your browser using open-source libraries.
A time zone converter shows the same instant on several clocks at once, so you can see what time it is right now (or at any moment you pick) in New York, London, Baku, Delhi, Kathmandu, Tokyo or any other supported city. Instead of memorizing UTC offsets, you simply read each city’s clock.
This tool relies on the browser’s built-in Intl.DateTimeFormat with real IANA time zone data. That means daylight saving transitions are exact, including the US rules for spring 2026 and fall 2026, the half-hour offset of India (UTC+5:30), the 15-minute offset of Nepal (UTC+5:45), and the date-line flip you hit when a 22:00 meeting in Baku lands at 07:00 the next morning in Samoa.
Yes, free with no signup or limits.
They come from the IANA time zone database built into your browser, so they match the real transition dates and times.
You crossed a spring-forward DST boundary: that local hour does not exist, so the clock skips it. The reverse happens in autumn, when an hour repeats.