Riyadh is 2 hours ahead of Geneva
Best overlap: 8:00 AM to 4:00 PM in Geneva is 10:00 AM to 6:00 PM in Riyadh.
Shoot for 8:00 AM to 4:00 PM in Geneva; your Riyadh colleagues will see that as 10:00 AM to 6:00 PM. This is one of the easier pairings: 8 hours of shared time means flexible, low-stress scheduling. Daylight saving complicates things slightly: Geneva observes it, Riyadh doesn't, so the difference flexes by an hour part of the year.