San Diego is 15 hours behind Taipei

Best overlap: 8:00 AM to 9:00 AM in Taipei is 5:00 PM to 6:00 PM in San Diego.

For the smoothest call, aim inside 8:00 AM to 9:00 AM in Taipei, i.e. 5:00 PM to 6:00 PM in San Diego. The overlap barely stretches to 1 hour, so reserve it for what really needs a live conversation and handle the rest async. Because San Diego is on the previous day, weekend boundaries can shift; check that neither side is meeting on their day off. Note that San Diego follows daylight saving while Taipei stays put, so the times above drift by an hour seasonally.