9am in London is 11am in Riyadh

When it’s 9am in London, it’s 12pm (noon) in Riyadh. Riyadh is 3 hours ahead London. London observes daylight saving time but Riyadh does not, so the gap shifts by one hour during clock changes. The best time to schedule calls between the two cities is 9am to 3pm London time (which is 12pm (noon) to 6pm in Riyadh). Business travelers between London and Riyadh benefit from substantial market overlap, with opening bells and close-of-business windows lining up comfortably. In practice, teams in London tend to take early-morning calls to reach Riyadh during standard afternoon hours, while Riyadh counterparts can schedule near end of day. Having a standing calendar slot for cross-city calls reduces back-and-forth over scheduling and keeps projects moving efficiently.