Geneva is 9 hours ahead of San Diego
Best overlap: 8:00 AM to 9:00 AM in San Diego is 5:00 PM to 6:00 PM in Geneva.
Book within 8:00 AM to 9:00 AM San Diego time (5:00 PM to 6:00 PM in Geneva) and both teams will be at work. The overlap barely stretches to 1 hour, so reserve it for what really needs a live conversation and handle the rest async.