12pm in Sydney is 4pm in London

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