Scheduling meetings
Find a time that works across every office or client time zone before you send the invite.
Time
On-device · No upload
Timezone Converter
Compare times across cities and time zones instantly. Pick a date and time, add any city, and see the converted local time — including UTC offset and day difference.
Timezone Converter compares the same moment in time across any cities or time zones you choose. Pick a date and time in one zone, and see the converted local time, UTC offset, and day difference (yesterday, today, tomorrow) for every other zone you add. Handles daylight saving time automatically using each zone's current rules. Everything runs locally in your browser — no upload, no account, no server round-trip.
Time to convert
Add a city or time zone
Choose from over 60 cities across every region. Each card updates automatically, including daylight saving time.
Converted times
Add a city above to compare its local time.
Common uses
Travel planning
Check the local time at your destination so calls, check-ins, and flight connections land at sensible hours.
Remote teams
Keep a running comparison of teammates' cities so you always know if it's a good time to message them.
Live events
Convert a stream, launch, or match start time into every viewer's local time zone.
Frequently Asked Questions
What is the difference between a time zone and a UTC offset?
A time zone, such as Europe/Paris, is a named region with its own rules, including whether and when it observes daylight saving time. A UTC offset, such as UTC+1, is simply the current difference from Coordinated Universal Time at a given moment, and it can change twice a year in zones that use daylight saving time.
Does this tool account for daylight saving time?
Yes. Each city's offset is calculated for the exact date you select using your browser's built-in time zone database, so it automatically reflects daylight saving time changes rather than using a fixed offset.
Why does a city show a different date, not just a different time?
Time zones can be far enough apart that converting a time crosses midnight. The Yesterday, Today, and Tomorrow badges show how each city's calendar date compares to the date you selected in the source time zone.
Is my data private when I use this tool?
Yes. All conversions happen in your browser using JavaScript's built-in time zone data. Nothing you enter is uploaded, stored on a server, or shared with anyone.
Can I compare more than two time zones at once?
Yes. Add as many cities as you like, up to 12 at a time, and every card updates together whenever you change the date, time, or source zone.
Why is my local time zone already filled in?
The tool reads your device's time zone automatically using your browser settings so you can start comparing right away. You can change the source time zone at any time.