How to Convert Between Time Zones

Time zone conversion has three moving parts, and each one is a chance to be wrong. First, the offset: you need each region's distance from UTC, and not everyone can recite that from memory. Second, daylight saving: many countries shift their clocks twice a year, on different dates, so the gap between two cities is not fixed - it can be five hours in January and four in July. Third, the date: when a conversion crosses midnight, the local calendar day rolls forward or back, which is easy to forget.

Mix those up and you get the classic failures - a meeting booked an hour off, or a deadline that lands on the wrong day. Doing the math by hand under time pressure only makes it worse.

The dependable approach is to let a tool that follows real calendar rules do the conversion, so the offset, daylight saving and date rollover are all handled at once. The Time Zones converter does exactly this in your browser: pick the source city and time, add the target cities, and read the matching local times side by side.

Because it uses the same IANA time zone database your operating system relies on, it applies the correct rule for the specific date you enter rather than a fixed offset. And because it runs locally, your schedule details never leave your device. If you are working with a Unix timestamp rather than a wall-clock time, pair it with the Timestamp Converter to turn the epoch value into a real date first.