Time Zone Converter
Scheduling across time zones goes wrong twice a year, when one country changes its clocks and the other doesn't. This uses your device's full time zone database for the exact date you pick, so the daylight-saving shift is already accounted for.
🛡️ Runs on your device — nothing is uploaded
Results update as you type — nothing else to press.
How it works
- Pick the date and time.
- Choose the two time zones.
- Read the converted time, the difference, and whether it lands on another day.
Good to know
FormatsEvery IANA time zone your device knows
- Booking a call with someone overseas
- Checking when a launch or deadline lands locally
- Planning around a daylight-saving changeover
Questions
Does it handle daylight saving?
Yes — for the specific date you choose, which is the part most converters get wrong near a changeover.
Why does it say 'next day there'?
Because crossing enough time zones moves you past midnight. That's exactly the mistake that makes people miss meetings.
Where does the time zone list come from?
Your own device's time zone database, so it's as current as your operating system.
🔒 Processed entirely in your browser — nothing is uploaded, nothing is stored.