Ottawa is 3 hours ahead of San Diego
Best overlap: 8:00 AM to 3:00 PM in San Diego is 11:00 AM to 6:00 PM in Ottawa.
Shoot for 8:00 AM to 3:00 PM in San Diego; your Ottawa colleagues will see that as 11:00 AM to 6:00 PM. Ottawa is 3 hours ahead of San Diego, but you'd hardly notice — 7 hours of shared hours makes this feel like working in neighbouring time zones.