Apparent Movement of the Sun

Apparent movement of the sun

1° in 4 Minutes
15° in 1 Hour
360° in 24 Hours

While this doesn’t always exactly reflect the local time zone, as a rough check for every 15° east you are from Greenwich you add another hour to the time of your clock.  As an example Brisbane - Sydney (east coast Australia) approximately 150°, the time zone is GMT +10 hours.