Sydney is typically 2 hours ahead of Seoul. When it's 3:00 PM in Sydney, it's 1:00 PM in Seoul. South Korea does not observe daylight saving time, but Sydney does.
During Australian summer (October to April), Sydney is 2 hours ahead. During Australian winter (April to October), Sydney is only 1 hour ahead of Seoul.
Optimal meeting window: 10:00 AM - 6:00 PM Sydney time (8:00 AM - 4:00 PM Seoul in summer, 9:00 AM - 5:00 PM in winter). Near-perfect business hours overlap.
Australia and South Korea have strong trade ties, particularly in resources and agriculture. K-pop and Korean culture have a massive following in Australia.