Time Zone Converter
Choose two time zones and a date and time. The converted result updates instantly, with daylight saving taken into account.
Convert any time between two zones
Choose a source zone, a destination zone, and a date and time. The result updates immediately with the local date and time in both places, along with their UTC offsets and the difference between them.
How to use the converter
- Select the From zone. It starts on your device's time zone.
- Select the To zone. Your last choices are remembered.
- Set the date and time.
- Read the result, or press the swap button to reverse the direction.
Why the date matters
Offsets change during the year. New York is 5 hours behind London for most of the year, but for a few weeks each spring and autumn the gap is 4 hours, because the US and Europe change their clocks on different dates. That is why this tool asks for a date and uses the IANA time zone rules for that exact moment. For more on this, read how to convert time zones.
Daylight saving edge cases
Twice a year, some local times are unusual. When clocks jump forward, a time such as 2:30 AM does not exist that day. When clocks go back, a time such as 1:30 AM happens twice. This converter tells you when you have picked one of these times and explains how it handled it.
To watch several cities at once, use the world clock.
Frequently asked questions
Which time zones are supported?
All the IANA time zones your browser knows about, with major cities listed first.
Does it handle daylight saving time?
Yes, for the specific date you choose, including the days when the clocks change.
How far ahead can I convert?
To any date, but future rules are only a best estimate because governments occasionally change their time zone laws.