Best overlap: 4:00 PM to 6:00 PM in San Francisco is 8:00 AM to 10:00 AM in Shenzhen.
The overlap falls at 4:00 PM to 6:00 PM in San Francisco, or 8:00 AM to 10:00 AM if you're in Shenzhen. The overlap is tight at roughly 2 hours, so protect it: 4:00 PM in San Francisco / 8:00 AM in Shenzhen is your safest recurring slot. The overlap spans the date line; in practical terms, Shenzhen is on the next day compared to San Francisco. Heads up: because San Francisco changes its clocks and Shenzhen doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
San Francisco America/Los Angeles | ||||||||||||||||||||||||
Shenzhen Asia/Shanghai |
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