Compare time across multiple cities at once.
Working across teams, clients or partners in different countries means constantly tracking time differences. This tool converts a given date and time from your source time zone into any number of target cities at once โ no manual UTC offset math required.
All conversions run in your browser using the standard JavaScript Intl API, backed by the IANA time zone database โ the same database used by Linux, Android, iOS and most server systems. It automatically accounts for daylight saving time (DST) transitions, which differ by country and by year, so results stay accurate even around the spring/autumn clock changes.
The converter relies on the browser's built-in IANA/ICU time zone database via the JavaScript Intl API. That database stores historical and current DST transition rules for every region, so the UTC offset is calculated correctly for any given date โ not just today.
By default the tool auto-detects your time zone from browser settings and pre-fills the current time. You can change the source time zone to any city in the list โ the entered time will then be interpreted in that zone instead of your device's local zone.
Yes, check as many cities as you need from the list โ after clicking Convert, the tool displays a card with local time and UTC offset for every selected city simultaneously. Useful for scheduling calls across distributed teams.