Time Zone Converter

You choose a date and time, indicate which time zone it's in (the reference), and the tool shows the matching time in cities around the world, side by side. So you can see, at a glance, what time it will be in New York, London, Tokyo and other places at that same instant.

Under the hood, the conversion uses the browser's own time-zone database, which knows the offsets of each region — including daylight saving time where it exists. That avoids the mistake of simply adding or subtracting hours by hand, which ignores those details.

The reference zone's row is highlighted so you can quickly spot your starting point. Everything is calculated locally, updated as soon as you change the date, time or zone.

Converting time zones is essential in a connected world. Scheduling an online meeting with people in other countries means knowing what time it will be for each of them. Following an event, a live stream, a product launch or a match happening on another continent also depends on translating the time to yours.

It's useful for anyone working with international teams, travelers planning calls home, people shopping from foreign stores with time-limited deals, and anyone coordinating something across places with different clocks. Seeing several cities at once saves doing the math one by one.

The most common mistake is converting zones by adding hours in your head and forgetting daylight saving time. Several countries shift their clocks part of the year, so the difference between two cities can change with the season. That's why it's safer to use a tool that knows these rules than to rely on a fixed calculation.

Another slip is getting the source zone wrong. Entering a time thinking it's in one zone when it's actually in another throws off the whole conversion. Always check the reference zone before reading the results.

There's also the day rollover, which is easy to miss. When the difference is large, the same time can land on the next (or previous) day elsewhere in the world. Looking only at the hour, without the date, leads to scheduling on the wrong day.