New Zealand works its Christmas's completely different to RSA.
In RSA there is a public holiday on 16 Dec.This is the time most business' close for Xmas and return to work early in the new year.
IN NZ there is a public holiday in Auckland and Wellington in January, so business' close shortly before Xmas, but the break is after Xmas and there is effectively no business activity until late Jan.
while this may suit you in coming over in Jan,with setting up and so forth,it also means there is less recruitment going on at that time of the year.