Best overlap: 8:00 AM to 1:00 PM in Philadelphia is 1:00 PM to 6:00 PM in Edinburgh.
Shoot for 8:00 AM to 1:00 PM in Philadelphia; your Edinburgh colleagues will see that as 1:00 PM to 6:00 PM. Edinburgh is 5 hours ahead of Philadelphia, so the practical overlap is about 5 hours — generous enough for meetings, tight enough to be worth booking ahead.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Philadelphia America/New York | ||||||||||||||||||||||||
Edinburgh Europe/London |
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. -