Best overlap: 8:00 AM to 10:00 AM in London is 4:00 PM to 6:00 PM in Shenzhen.
For the smoothest call, aim inside 8:00 AM to 10:00 AM in London, i.e. 4:00 PM to 6:00 PM in Shenzhen. Shenzhen is 8 hours ahead of London, so common hours are scarce (about 2 hours). Lock the slot, keep it short, and follow up in writing. Don't be caught out by clock changes — London observes daylight saving and Shenzhen doesn't, so the offset varies by an hour through the year.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
London Europe/London | ||||||||||||||||||||||||
Shenzhen Asia/Shanghai |
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