How the time zone converter works
The converter uses the browser's built-in Intl.DateTimeFormat API — part of the ECMAScript Internationalization specification — to perform accurate, DST-aware timezone conversions without any external libraries. The input datetime is treated as a wall-clock time in the source timezone, converted to a UTC instant, and then formatted in the target timezone. This approach correctly handles daylight saving time transitions automatically.
Daylight saving time
Many timezones observe daylight saving time (DST), shifting clocks forward by one hour in summer and back in winter. The exact dates of these transitions vary by country and year. By using IANA timezone identifiers (like "America/New_York" rather than "EST"), the converter automatically applies the correct UTC offset for the specific date you entered. No manual offset adjustment is needed.
Covered timezones
This tool covers 26 of the world's most-used timezones, spanning every major continent and populated region: North America (ET, CT, MT, PT, AKT, HST), South America (BRT, ART), Europe (GMT, CET, MSK), Africa (EET, SAST), Middle East (GST), South Asia (PKT, IST, BST), Southeast and East Asia (ICT, SGT, CST, JST, KST), and Oceania (AEST, NZST). UTC is always available as a reference.
Common use cases
Time zone converters are essential for scheduling international meetings, coordinating with remote teams across continents, understanding global broadcast times (sports events, product launches, earnings calls), booking international flights, and interpreting timestamps in logs or data exports. When collaborating with people in multiple countries, this tool lets you quickly answer "what time is that for me?" with a single click.