The week runs for the six days up to and including Anzac Day and Judge Becroft is to deliver the Robson Lecture in the Napier City council chambers on the second day, April 23.
He will reflect on the evolution of New Zealand's youth justice system over the last 22 years and his address will be followed by the presentation of nine people as recipients of the Pilot City Trust annual awards, several of whom are to be recognised for their voluntary work involving young people.
The celebrations will open on April 21 with the Unity Walk, which has its roots in the 1990 New Zealand sesquicentennial walk from Taupo to Napier, part of a year of celebrations marking the 150th anniversary of the signing of the Treaty of Waitangi.
Its theme of bringing together people from different countries and cultures will be carried through in the Communities in Unity Walk.
The walk will start at Clive Square and pass the Napier volunteer organisations' base, the Community Hub, and the Napier Family Centre, and end at the Maraenui Shopping Centre.
Other events include a lunchtime ethnic concert in St John's Cathedral on April 24 and the Unity Dinner at the Napier RSA on Anzac Day.