Time Zone Converter — Convert Time Across Zones
Convert any time across 10+ world time zones instantly. DST-aware — New York, London, Tokyo, Kolkata, Sydney & more. Runs locally in your browser, no signup.
How to use the time zone converter — convert time across zones
Enter a date and time, select its source timezone, and instantly see that same moment in 10 major cities worldwide. Great for scheduling meetings across time zones or converting a server log timestamp to your local time.
Formula & explanation
Your input is converted to a UTC instant using the source zone's current offset (including DST), then reformatted into each target timezone via the browser's built-in Intl.DateTimeFormat (IANA database).
Examples
14:00 New York (EST, UTC−5) = 19:00 London = 20:00 Paris = 04:00 Tokyo next day. During US DST (EDT, UTC−4): 14:00 New York = 18:00 London.
Frequently asked questions
- Does this handle daylight saving time (DST)?
- Yes — the IANA timezone database built into every modern browser automatically applies DST rules for the selected date. Summer and winter times are handled correctly.
- What is UTC and why does it matter?
- UTC (Coordinated Universal Time) is the universal reference point. All other timezones are expressed as UTC±offset. Using UTC avoids DST ambiguity when storing or transmitting timestamps.
- How do I convert a Unix timestamp to a timezone?
- Use the Unix Timestamp Converter tool to turn the epoch number into a human date, then paste it here to see it in any timezone.
- Why do some cities show the same offset?
- Countries sometimes share a UTC offset but follow different DST schedules, so they can diverge at different times of year. For example, London and Lisbon are both UTC+0 in winter but Portugal observes DST while the UK also does — they stay in sync, but not all UTC+0 regions do.
- What is the difference between EST and EDT?
- EST (Eastern Standard Time) is UTC−5 and applies in winter. EDT (Eastern Daylight Time) is UTC−4 and applies in summer. 'ET' is the generic label used year-round when DST status is irrelevant.
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