Timezone Converter
Pick a source time and see it in up to four other time zones at once — with automatic daylight-saving adjustment.
Timezone Converter
Converted times
| Timezone | Date | Time |
|---|
🔒 Nothing you enter is sent anywhere or stored. All processing happens in your browser.
How it works
Coordinating across time zones is error-prone by hand because offsets differ and daylight-saving rules shift throughout the year. This converter removes the guesswork by using the browser's built-in Intl.DateTimeFormat with named IANA time zones, which carry each region's full history of DST rules.
Enter a date and time and choose the source zone — the tool treats your entry as the wall-clock time in that zone. It then computes the exact underlying instant and displays it in your source zone plus up to four target zones you add. Each row shows the local date, 12-hour time, and the zone's short abbreviation, so a 3 PM meeting in New York is shown correctly as 8 PM in London and the following morning in Tokyo.
Because DST is applied automatically per zone and per date, converting a January time and a July time between the same two cities can give different offsets — exactly as they should. The tool defaults the source to your own detected time zone and pre-loads New York and London as examples. All calculation is local; no clocks or locations are sent anywhere.