useChrono

About useChrono

useChrono is a web tool for people who schedule meetings across time zones. It converts a specific time between two locations, or finds a shared window where both workdays overlap on a chosen date. Users pick a pair of cities, a date, and working-hour ranges, and the tool shows the overlap for that calendar day.

The tool is aimed at remote and distributed teams that need to check whether a conversion also lands inside someone else's workday before sending an invite. Its calculations use IANA time zones through the browser's Intl API, so daylight-saving offsets and date rollover are accounted for when the selected date changes. Planning results can be shared as notes, and the full planner adds meeting duration, calendar links and export.

What sets it apart is the focus on overlap rather than only offset arithmetic. A simple conversion can still fall outside a colleague's day, and useChrono surfaces that before a request goes out. The site also lists popular city pairs and explains its calculation method, with a reminder to verify critical deadlines in a primary calendar or source system.