Cricket at the 'G on the 26th, a million people on Sydney Harbour on the 31st, and the Southern Alps three hours east of both. Two fixed dates and a whole summer to build around them. Tell me when and I'll shape it.

The Boxing Day Test starts at the MCG on 26 December, every year, without exception. Day 1 is the one people fly for - 90,000-odd in for the first session, and a city that shuts down around it. Get that date locked and the rest of the trip arranges itself.
Both are online applications, and both are slow - New Zealand especially. We prep the paperwork, check every document and submit for you, so the processing clock starts as early as it can.