"La somero komenciĝas en Decembro en Aŭstralio."
Translation:Summer begins in December in Australia.
I'm sorry to get ahead of myself, but is "komenciĝas" used here because although we have an object (marking time and place), it is not a direct object (marking direct action over)? Thanks in advance.
It is indeed used because we do not have a direct object, the summer just begins, it does not begin anything which "komencas" would imply as it is transitive.