Time zone converter and meeting planner
Convert a time between zones and find the overlap for a meeting.
How it works
Converts a time between zones and shows a working-hours overlap grid for scheduling across several of them.
Offsets are resolved through your browser’s IANA timezone database rather than fixed numbers, which is what makes daylight saving correct. A fixed "UTC+1" is wrong for half the year in most of Europe, and the transition dates differ between the EU, the UK, the US and the southern hemisphere — where the seasons are inverted, so the gap between London and Sydney swings between 9 and 11 hours over the year.
India, Iran, Afghanistan, Nepal, Myanmar and parts of Australia use half-hour or 45-minute offsets. Nepal is UTC+05:45, which exists to align noon with the sun over Kathmandu.
The overlap grid assumes a 9-to-5 working day in each zone. Where there is no overlap at all — which happens routinely between the US west coast and India — it says so rather than suggesting a time nobody will accept.
This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.
Common questions
- Why does the difference between two cities change during the year?
- Daylight saving. The two places switch on different dates, or one does not switch at all, so the gap is not constant.
- Are all time zones whole hours?
- No. India is UTC+05:30, Nepal is UTC+05:45, and parts of Australia use half-hour offsets.
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Sources
- Calculated on this page — At One Place