Time Zone Converter
Convert a chosen date and wall time between browser-supported IANA time zones with date-aware DST offsets, cross-date results, copy, and versioned setup links.
Convert a wall time on a specific date
Enter the date and clock time in the source zone, then choose the target zone. The result identifies one instant and displays it in both zones. The date matters because offsets can change with daylight-saving rules.
For example, 2026-07-21 at 09:00 in America/New_York converts to 14:00 in Europe/London. A winter date can have a different offset relationship. The page rejects impossible calendar dates and reports nonexistent wall times during a clock-forward transition.
Ambiguous times and saved inputs
A repeated fall-back wall time can name two instants. The converter uses its documented earlier-occurrence policy and shows an ambiguity warning. Valid URL parameters override locally stored preferences. Results depend on the runtime's IANA time-zone data.
Need to compare several people or cities before choosing a meeting slot? Use the time zone meeting planner for multi-zone work windows and candidate meeting times.
How the selected wall time is resolved
The source and destination selectors use IANA time zone identifiers such as America/New_York. The browser applies the offset and daylight-saving rules available in its international time data for the selected calendar date. The result can cross a date boundary.
The converter checks whether the entered wall time maps to zero, one, or two instants. Zero matches means the clock skipped that time during a spring-forward change. Two matches means the time occurred twice during a fall-back change. For two matches, this page shows the earlier instant and labels that choice.
Example: 2026-03-08 02:30 in America/New_York is rejected because that local time is skipped when the clock moves forward. By contrast, 2026-11-01 01:30 occurs twice, so the earlier occurrence is selected. Historical results depend on the time zone data supplied by your browser and operating system.
Read the guide to daylight-saving gaps, repeated times, and timezone conversions for the wall-time and instant distinction behind these results.
Sources: IANA Time Zone Database; ECMAScript internationalization time-zone data.
Accuracy and limitations
A setup link contains the selected date, time, source and destination zones, and seconds preference. Opening it does not replace preferences already saved by this converter in the browser. The browser storage guide explains the difference between saved preferences and URL settings.
Time zone abbreviations are display labels and can be ambiguous. The conversion uses the full IANA identifier selected in the interface. Fixed UTC offsets are not treated as locations with daylight-saving rules.
Important appointments should still be checked in the calendar service used by the participants. That service may choose a different occurrence for a repeated local time.
Maintained by Suhas Sunder. See how iLoveTimers is made.
Last reviewed .