Hundreds of people — many of whom have never done the haka before — will come together to perform the war dance in a show of support for men's mental health.
Leon Ruri is coordinating the event.
He has battled depression himself and said talking to a friend stopped him taking his life.
"I rang him up and said I can't take it anymore, I'm checking out you know. He had some strong words to say to me down the phone and was able to turn my mindset around," he said.
Mr Ruri wants to encourage men to speak more openly about mental health.