Best overlap: 8:30 AM to 12:30 PM in Edinburgh is 2:00 PM to 6:00 PM in Mumbai.
For a call that suits both sides, look at 8:30 AM to 12:30 PM in Edinburgh / 2:00 PM to 6:00 PM in Mumbai. With 4 hours of overlap, 8:30 AM in Edinburgh (2:00 PM in Mumbai) is a comfortable, repeatable slot for both sides. These times hold for most of the year, but Edinburgh's daylight saving (which Mumbai doesn't use) shifts them by an hour twice annually.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Edinburgh Europe/London | ||||||||||||||||||||||||
Mumbai Asia/Kolkata |
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -
Swatch once tried to kill time zones with .beats. But could UTC be the serious replacement the world actually needs? -