Timezone Converter
Convert date and time between world timezones
World Clock
How to convert between time zones
For international meetings, deadlines set in another country, or simply messaging someone several hours away, getting "their time versus my time" wrong wrecks the plan. Enter a date and time plus its source time zone here and the tool shows the equivalent in the target zone. A swap button reverses the two, so checking the return direction takes one click.
Press the button that fills in the current time and you immediately see what time it is on the other side. A world clock listing the current time in major cities is shown alongside, which helps when you need to find a slot that works across several offices at once.
Conversion uses the IANA time zone database built into your browser, so daylight saving transitions follow each region's own rules automatically. Remember that the United States and Europe switch on different dates, which means the offset between them changes for a few weeks each spring and autumn. All calculation happens locally.
Frequently asked questions
- Is daylight saving time taken into account?
- Yes. The tool uses your browser's IANA time zone data to determine whether DST applies on the date you entered.
- Why does the offset between two cities change during the year?
- Because regions start and end daylight saving on different dates. For a few weeks each spring and autumn the usual difference shifts by an hour.
- Are UTC and GMT the same?
- In practice they point to the same moment. UTC is the atomic-clock-based standard, while GMT is the older term rooted in British standard time. For everyday conversion the difference does not matter.
- Is the date and time I enter sent anywhere?
- No. The conversion runs entirely inside your browser.
