Stockholm is 1 hour behind Riyadh
Best overlap: 9:00 AM to 6:00 PM in Riyadh is 8:00 AM to 5:00 PM in Stockholm.
Plan around 9:00 AM to 6:00 PM in Riyadh, which is 8:00 AM to 5:00 PM in Stockholm, to catch everyone during office hours. Stockholm is 1 hour behind Riyadh, but you'd hardly notice — 9 hours of shared hours makes this feel like working in neighbouring time zones. Note that Stockholm follows daylight saving while Riyadh stays put, so the times above drift by an hour seasonally.