San Diego is 16 hours behind Shenzhen
Best overlap: 8:00 AM to 10:00 AM in Shenzhen is 4:00 PM to 6:00 PM in San Diego.
Shenzhen and San Diego overlap from 8:00 AM to 10:00 AM (Shenzhen) to the equivalent 4:00 PM to 6:00 PM in San Diego — that's your meeting window. San Diego is 16 hours behind Shenzhen, giving you a slim 2 hours to work with. Punctuality matters; start right at 8:00 AM in Shenzhen (4:00 PM in San Diego). Worth a glance at the calendar — San Diego is on the previous day, so align on the date as well as the time. One seasonal catch: San Diego springs forward and falls back, but Shenzhen doesn't, so the gap changes by an hour for several months of the year.