Time Zone Converter

• Choose the starting zone, the date and the time, then add the destination cities or zones. Each result gives the local time, the date, the UTC offset, the difference in hours and whether daylight saving is in effect.
• The conversion uses the date you enter, not today's: the gap between two cities can change over the year because clock changes do not happen everywhere on the same dates. Everything is computed with your browser's IANA database.
• A time that does not exist (spring-forward) is moved forward with a warning; a time that happens twice (fall-back) uses the first occurrence, and the tool says so.
• The planner lays out the 24 hours of the starting zone against each city's local time: green for working hours (adjustable, 9 am – 6 pm by default), a darker column when everyone is available, and the list of shared slots.
• The shareable link puts your choices after the “#” of the address: that part stays in your browser and is never sent to a server. Your favourite zones are also remembered locally.

How to use this tool

1. Select the starting zone, the date and the time (or “Now”).
2. Add destination cities or zones with the search box.
3. Read the converted times, day changes and daylight saving.
4. To set a meeting, look for the green columns in the planner, then copy the link to share.