A National Remembrance Service for the victims of the mosque attacks and all those affected by the tragedy will be held in Christchurch on Friday, 29 March.
The service will be in Hagley Park and will be jointly led by the Government, the city of Christchurch, Ngāi Tahu and the Muslim community.
Consideration is being given to simultaneously broadcasting the service to events in Auckland, Wellington and Dunedin and providing links for events in other towns and cities.
"The National Remembrance Service provides an opportunity for Cantabrians, New Zealanders and people all around the world to come together as one to honour the victims of the terrorist attack,'' Prime Minister Jacinda Ardern says.
"In the week since the unprecedented terror attack there has been an outpouring of grief and love in our country. The service will be a chance to once again show that New Zealanders are compassionate, inclusive and diverse, and that we will protect those values.
"The terrorist attack has been significant for many countries. We anticipate international guests and visitors will want to attend and to join us in our sorrow and support for the victims and their families,'' the Prime Minister says.
Christchurch Mayor Lianne Dalziel says this will be a time for everyone, locally, nationally and internationally, to come together in unity.
"I am very proud of the way our city and nation have responded to this terrorist attack. What happened on Friday 15 March 2019 will never define us. It is what has happened since, the love and the compassion, that's what defines us.
"Coming together on Friday will demonstrate support for all our communities, no matter where we were born, no matter where and how we choose to express our faith. We do not stand alone, we stand together. We will not be divided by hatred, we will be united by love,'' the Mayor says.
The details of the service, including broadcast arrangements and order of service, will be announced later in the week.