Among others to have delivered the lecture or presented the awards have been at least two Governors-General, a Chief Justice and a Minister of Justice, and Dr John Harre, the first principal of the Hawke's Bay Community College, scene of Hercus' challenge and now known as the EIT.
Workman, a police officer for more than 20 years before becoming head of the Prison Service in the exploding jails-population years of 1989-1993, was made a Companion of the Queen's Service Order (QSO) in 2007, and was knighted in the recent New Year Honours for services to prisoner welfare and the justice sector.
Now 78, he last year produced his latest self-penned memoir - Journey Towards Justice.
Pilot City Trust spokesman Mark Cleary, a former principal of Colenso High School (now William Colenso College), said the Unity Celebrations will also include forums on Restorative Justice and the roles local and central government can play in supporting the concept of Napier piloting working alternatives to violence.
The celebrations end with a unity walk from Tangoio Marae, beside State Highway 2 north of Bay View, to Pukemokimoki Marae, on the southern outskirts of the city on April 28.