San Diego is 9 hours behind Geneva
Best overlap: 5:00 PM to 6:00 PM in Geneva is 8:00 AM to 9:00 AM in San Diego.
Plan around 5:00 PM to 6:00 PM in Geneva, which is 8:00 AM to 9:00 AM in San Diego, to catch everyone during office hours. The overlap barely stretches to 1 hour, so reserve it for what really needs a live conversation and handle the rest async.