Time Zone Converter

Convert any date and time from one time zone to another — useful for scheduling calls, flights, or events across regions.

A time zone isn't really a place — it's a rule about what offset from UTC a given region uses at a given moment, and that rule changes twice a year in most countries that observe Daylight Saving Time. That detail is exactly what makes manual time zone math so easy to get subtly wrong: knowing that New York is normally five hours behind London doesn't help if you don't also know whether either city has adjusted its clocks for the season, and the two don't always shift on the same date.

A time zone converter's actual job isn't the arithmetic — subtracting or adding a few hours is simple — it's correctly knowing the current rule for each named zone at the specific date you're asking about, which requires an up-to-date time zone database rather than a fixed offset table. That's a detail easy to get wrong when done by hand and easy to get right when a computer does it, provided the computer's underlying time zone data is current.

This tool uses your browser's own built-in time zone database — the same one your operating system relies on — rather than a fixed table baked into the page, which means it automatically stays correct as Daylight Saving Time rules shift over the years without anyone needing to update this tool manually. Pick a date and time, choose a "from" and "to" zone by name, and it handles the seasonal offset correctly behind the scenes.

1. Pick the date and time you want to convert.
2. Choose the "from" time zone.
3. Choose the "to" time zone.
4. Press Convert to see the equivalent local time.