Sydney is the same time as Guam (AEST), and 1 hour ahead during AEDT. Guam uses Chamorro Standard Time (ChST, UTC+10). Sydney uses Australian Eastern Time and observes DST.
When it's 12:00 PM in Guam, it's 12:00 PM (AEST) or 1:00 PM (AEDT) in Sydney.
Most hours work! With only a 0-1 hour difference, business hours overlap almost entirely.
Guam is a Pacific island destination. United Airlines connects Guam to the Asia-Pacific region, making it accessible from Australia via Japan or the Philippines.