Free online timezone converter: pick cities and see the equivalent time instantly, plus a live world-clock board. For meetings, travel, and distributed teams. Runs locally in your browser.
TL;DR: Free timezone converter: city-pair conversion plus a live eight-city world clock. Meetings, flights, and distributed teams at a glance — fully local.
For local tools, open DevTools → Network and search your input — it should not appear in requests.
Next steps
Usage Guide
Scheduling across continents, checking flight arrivals, aligning deadlines for distributed teams — timezone math is the daily tax of global work. Pick cities and see the conversion instantly, with a live eight-city board alongside. Powered by the IANA timezone database built into your browser (DST rules included), fully local.
1. How to use
- Choose source and target timezones (city shortcuts plus the full ~400-zone IANA list).
- Enter the date-time in the source zone (YYYY-MM-DD HH:mm) or press Now.
- Read the result; swap directions with the arrows; cross-check other cities on the board.
2. Daylight saving: the classic trap
Offsets are not constants. New York is 13 hours behind Beijing in winter and 12 in summer (US DST: second Sunday of March to first Sunday of November); Sydney runs DST in the opposite direction (southern hemisphere), and rule changes pile on further surprises. The tool applies IANA rules for the exact date you enter. For recurring meetings across DST boundaries, re-verify each key date instead of memorizing one fixed offset.
3. Practical meeting-planning tips
- Use the board to find waking-hours windows: set 20:00 Beijing and read New York (8am) and London (1pm) directly.
- Check the weekday in the result — Friday afternoon for you can be Saturday dawn across the date line.
- Write dual times in invites (14:00 CST / 02:00 UTC) so nobody has to do mental arithmetic.
FAQ
Yes. Conversions rely on the browser's built-in IANA timezone data (the Intl API) and are computed locally — no network requests involved.
Yes. Conversions follow IANA rules including DST transitions: New York's offset to Beijing differs between March and November, and the tool resolves it from the date you pick.
The dropdowns offer quick city shortcuts plus the full IANA list of roughly 400 zones, covering every official timezone worldwide.
Use the live city board: set the reference time and see eight cities side by side, then screenshot it into the team chat to lock the meeting slot.
Saying "eight in the evening" with no timezone attached, sending calendar invites without an explicit UTC offset, and skipping a double-check around DST transition days — meetings that span a switch are the most error-prone.
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