1. What does this tool do
This free online timezone converter turns a date and time in one timezone into the same moment in any other—supporting all IANA timezones and daylight saving. Use it for time zone conversion when scheduling meetings, traveling, or working with remote teams. Enter once, see results everywhere. Free and private; no sign-up, all in your browser. Ideal for “9am New York in London and Tokyo,” travel, or support office hours.
2. How to use it
Quick start: Enter the date and time, select source timezone, add one or more target timezones, then read the converted times. Copy results for invites and plans.
- Enter date and time — Type or pick the local date and time you want to convert (or leave as “now” if the tool supports it).
- Select source timezone — Choose the timezone of the time you entered.
- Add target timezones — Select one or more zones to see the same moment in each.
- Read results — Each target shows the converted date and time. Copy or use for invites and plans.
3. How it works
The tool uses the browser’s Date implementation and IANA timezone data (e.g. via Intl or a library). The input is interpreted in the source zone, converted to UTC, then to each target zone. DST (daylight saving) is applied according to the zone rules. All processing is client-side in your browser. No data is sent to any server.
4. Use cases & examples
- Meeting scheduler and time zone conversion — “9am New York” in London, Tokyo, and Sydney.
- Travel — Landing at 3pm local; what time is it at home?
- Support — Publish “office hours” in one zone and show equivalents for users elsewhere.
- Logs — Interpret timestamps from servers in another timezone.
Example
- 2024-06-15 14:00 America/New_York → e.g. 19:00 UTC, 20:00 Europe/London (BST), 07:00+1 Asia/Tokyo (next day).
5. Limitations & known constraints
- IANA only — Only IANA timezone names (e.g. America/New_York) are supported; abbreviations (EST, PST) can be ambiguous and may not be used.
- Date range — Historical and future DST rules depend on the data; very old or far-future dates may edge-case in some browsers.
- No calendar events — This is a conversion tool only; it does not create or sync calendar entries.