Best overlap: 4:00 PM to 6:00 PM in Hong Kong is 8:00 AM to 10:00 AM in Manchester.
4:00 PM to 6:00 PM in Hong Kong is when Manchester is also working, at 8:00 AM to 10:00 AM their time. Because Manchester is 8 hours behind Hong Kong, the shared window is only about 2 hours. A fixed slot at 4:00 PM in Hong Kong (8:00 AM in Manchester) saves a lot of back-and-forth. The window above shifts seasonally: Manchester keeps daylight saving while Hong Kong ignores it.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hong Kong Asia/Hong Kong | ||||||||||||||||||||||||
Manchester 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. -