Australia Post Website states that they are closed until Monday 5th January except for selected Post Offices which will open for limited hours on Saturday. 

Friday is a nominated AP holiday.

There will be no Parcel sorting or delivery during this period.

And Yes - The red boxes should have been emptied today at whatever time your red box says - but it will go to the Sorting Centre and stay there until Monday.

Just spent half an hour letting my customers know of the delay.