Time Zone Converter
Add the cities you work with, then drag across the day to find an hour that suits everyone. Daylight saving is handled for the exact date you pick.
How it works
Pick a date and a time in your home zone (the first row). Every other row shows the same moment in its own local time, worked out with your browser’s built-in time zone database, so daylight saving time is applied for the exact date you choose — including the weeks in March and October–November when Europe and North America switch on different days.
Each row’s strip is the home day split into 24 hours, labelled with that city’s local hour. Green cells are 9 to 5 local time, grey cells early morning and evening. Drag across any strip, or use the slider, to move the time; the black bar underneath marks hours when every city is in working hours.
Your cities are remembered in this browser. “Copy link” puts the date, time and cities in the URL so someone else opens exactly the same comparison.
Questions
How do I find a meeting time across time zones?
Add each attendee’s city, then look for hours marked in the black “all free” bar under the strips. If there isn’t one, the note below the planner lists the hours with the most overlap so you can pick the least painful compromise.
Does this handle daylight saving time?
Yes. Offsets are calculated for the date you select, not today. Rows show a note when that city’s clocks change within the next three weeks, which is when meetings most often go wrong.
What’s the difference between EST and ET?
EST (UTC−5) is Eastern Standard Time, used in winter; EDT (UTC−4) is the summer daylight time. “ET” means whichever one is in effect. Picking a city such as New York avoids the ambiguity.
Why do some cities have 30- or 45-minute offsets?
A few zones sit between whole hours, such as India (UTC+5:30), Nepal (UTC+5:45) and Newfoundland (UTC−3:30). The strips mark those hours with ½ and the times are exact.