In New Zealand, there are different public holidays depending on which area you live in to celebrate the anniversary of that area.
This year (this weekend in fact) represents the 175th anniversary of Auckland and there were fireworks (of course!) to commemmorate the occasion which were far better than the ones put on for New Year. I believe that the 3 sets to the left of the Sky Tower are all being launched from boats in the Waitemata Harbour. There is also a regatta and displays around the city centre of various views of days of yore and how the city has changed. It is fair to say that the population has grown at a staggering rate in the last 20 years or so.
Anyway, if you would like to see the fireworks, here are a couple of links to YouTube. Enjoy!