Start with a date and place
Choose the reference city and date, enter a local time, then apply it. Each city row shows its local date, time and UTC offset. Add a country to search smaller places, or enter a full IANA identifier.
One instant, several local clocks
The converter resolves the reference wall clock to a UTC instant using the browser’s timezone rules. A skipped local time is rejected. For a repeated time, choose the earlier or later occurrence explicitly.
Worked example: Kathmandu and Kuwait
On 15 January 2026, 12:00 in Kathmandu (UTC+05:45) is 09:15 in Kuwait (UTC+03:00). A 45-minute offset is preserved; the converter does not round time zones to hours.
Limitations & sources
A country can contain several time zones. Abbreviations such as CST are ambiguous. Browser rule updates can change future results. Check the local date when a conversion crosses midnight.
IANA Time Zone Database · Sources and updates · Holidays & working days