Time zone overlap finder
Find the best time to meet, anywhere in the world.
Enter two or three cities. Meridian lines up their real working hours - correctly, including daylight saving and half-hour zones - and shows you exactly where they overlap.
Popular time zone comparisons
Jump straight to a common pairing.Frequently asked questions
- How does Meridian work out the overlap?
- Each city's current UTC offset is read from your browser's own time zone database, in minutes rather than whole hours - so half-hour and 45-minute zones (India, Nepal, the Chatham Islands) come out correct too. 09:00–17:00 local time counts as core working hours, 07:00–09:00 and 17:00–22:00 as early or late but workable, and the rest as outside normal waking hours. Every selected city is combined hour by hour to find the windows that work for everyone.
- Does it account for daylight saving time?
- Yes, automatically. Because Meridian reads live time zone data instead of a fixed offset table, clocks that move forward or back for daylight saving are handled without you doing anything, and the page always reflects today's rules.
- What does the radial chart show?
- Each ring is one city's full day, laid out clockwise around a 24-hour dial starting at 00:00 UTC at the top. The outer ring is always your first ("primary") city. Where every ring lands on green at the same clock position, Meridian draws a gold arc just outside the dial - that arc is the actual overlap, not just a description of it.
- Can I compare three cities at once?
- Yes - add a third city and Meridian looks for the slice of the day that works across all three, using the strictest city as the limiting factor.
- Is any of my data sent to a server?
- No accounts, no tracking cookies. Meridian looks up common cities from a small built-in list instantly; anything else is resolved through a public geocoding lookup called directly from your browser. All the time math happens locally.