World time converter

This world time converter maps one instant to local time across up to six cities, so you can answer questions like what 9 AM in New York becomes in London, Mumbai, or Sydney without manual conversion.

Add your cities, set a reference location, and click any hour on the timeline to lock a fixed meeting moment. The same column shows that instant in every row, while weekend and late-night shading helps you avoid poor slots quickly.

Times are calculated in your browser with Luxon plus IANA timezone data, so daylight saving transitions update automatically for the selected date. You do not need to manually adjust offsets when regions switch between standard and summer time.

Half-hour and quarter-hour regions are supported, including offsets such as UTC+5:30 and UTC+5:45. Time labels like EST or EDT reflect the actual offset active at the selected instant.

After choosing a workable hour, copy the page URL to share the exact city list, reference zone, mode, and selected datetime with teammates. Opening that link restores the same comparison view.

If your workflow continues into logs, APIs, or incident timelines, use the Unix timestamp converter next to convert the chosen meeting moment into Unix epoch seconds, milliseconds, or ISO values.

Most mismatches come from using the wrong date or staying in live mode when you meant to compare a fixed future slot. Switch to a fixed date and click the target hour to keep all rows anchored to one instant.

If a city appears one hour off, re-check the selected date first. DST boundaries change the gap between regions during parts of the year, and the converter applies those date-specific rules automatically.