Time‑Zone Converter

Enter a date and time in one time zone and instantly see the equivalent in another zone. The converter accounts for daylight‑saving time changes and works completely offline.

How Time‑Zone Conversion Works

The browser provides a list of IANA time‑zone identifiers (e.g., "America/New_York", "Europe/London"). When you select a source and target zone, the script creates two Date objects using Intl.DateTimeFormat to interpret the input in the source zone, then formats the same instant in the target zone. This method respects DST transitions, leap seconds, and historical changes because it relies on the underlying operating system's time‑zone database.

Because all calculations are performed client‑side, your data never leaves the device, guaranteeing privacy. The tool is useful for scheduling meetings across continents, checking flight arrival times, or converting timestamps for developers.