Sydney is 8-9 hours ahead of Johannesburg. Sydney uses Australian Eastern Time (AEST/AEDT, UTC+10/+11) while Johannesburg uses South Africa Standard Time (SAST, UTC+2). When it's 12:00 PM in Johannesburg, it's 8:00 PM or 9:00 PM in Sydney.
South Africa does not observe daylight saving time, while Sydney does. During Sydney's summer (October to April), the difference is 9 hours; during winter, it's 8 hours.
Best calling time: 5:00 PM - 10:00 PM Sydney time. This corresponds to 9:00 AM - 2:00 PM in Johannesburg, covering morning business hours.
Sydney and Johannesburg are major Southern Hemisphere cities with growing business ties. Direct flights via Perth connect them, taking about 11-14 hours depending on the route.