It's hoped the sentencing of the Christchurch mosque gunman will bring some families closure.
Brenton Tarrant has pleaded guilty to 51 charges of murder, 40 of attempted murder, and one of terrorism.
More than 60 victim impact statements will be read during the four-day hearing, starting at the Christchurch High Court on Monday.
Former Federation of Islamic Associations president Hazim Arafeh says the feelings will always be raw for some.
"Some people will never recover from what happened," he told The AM Show.
Tarrant opened fire at Christchurch's Al Noor Mosque on March 15, 2019, before driving to Linwood Mosque where he opened fire again. The attack sparked an outpouring of support for the Muslim community in New Zealand and around the world.
Arafeh said on Monday New Zealanders had expressed solidarity with the Muslim community since that day, and the true essence of "Kia Kaha".
"It [sentencing] will bring closure to some people," he said.
"The community has been treated well. Some members will live for the rest of their lives in shock of what happened."
On Friday, Prime Minister Jacinda Ardern said the sentencing would be a hard week for the community.
"I don't think there's anything I can say that is going to ease how traumatic that period is going to be," Ardern told reporters.
"The whole process is likely to take some time. That's as it should be - people need to be heard."
Tarrant's sentencing will start at 10am Monday.