Time Zone Converter
Convert a date and time across 30 time zones simultaneously — add or remove zones freely.
How to use this tool
- 1Set the date and time using the datetime-local input.
- 2Choose the source time zone from the 'Source time zone' dropdown.
- 3Add target time zones from the 'Add time zone' dropdown.
- 4All target times update instantly — click ✕ to remove a zone.
About Time Zone Converter
Scheduling a meeting across multiple time zones requires knowing what time it is in each location simultaneously. This converter takes a date and time input and a source time zone, then displays the equivalent time in each of your target time zones. Start with three default targets (America/New_York, Europe/London, Asia/Tokyo) and add more from a dropdown of 30 zones covering all major regions. Remove any zone with the ✕ button. The conversion uses Intl.DateTimeFormat with the target time zone for accurate DST-aware formatting — the browser's Intl API handles daylight saving time transitions automatically. The source time zone offset is calculated by comparing UTC and local representations of the date. Remote teams scheduling standups, travellers planning calls home, and event organisers setting global launch times are the primary users.
Frequently asked questions
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