We had a spate of UFO sightings off the Kaikoura Coast (east coast of the South Island) in December 1978.
An Argosy transport plane sighted something strange one night and on a subsequent flight with a TV crew on board filmed the UFOs complete with comfirmation from radar and other air and ground observers.
www.classicfighters.co.nz/aircraft/argosy.htm (the airframe of the transport plane is now a cafe)
www.ufocasebook.com/newzealand1978.html
Other than that I cant think of any strange things off the top of my head.