Brenton Tarrant, formerly of Grafton, was led into the court barefoot in a prison robe and handcuffs, and was not required to speak during his brief three-minute appearance.
Jacinda Ardern reiterated to the public on Saturday morning that the country's gun law will be changed.
At least 49 people were killed in Friday's attack.
The Canterbury cricket team, one of six first-class sides in New Zealand's domestic Plunket Shield competition, also chose not to play their final round match in Wellington, which handed the title to Central Districts.
Footage of the attack on one of the mosques was broadcast live on Facebook, and a "manifesto" denouncing immigrants as "invaders" was sent to politicians and media outlets and posted online via links to related social media accounts.
Prime Minister Jacinda Ardern called the incident "an extraordinary act of unprecedented violence" and "New Zealand's darkest day".
"He had a big gun.He came and started shooting everyone in the mosque, everywhere", said the man, Ahmad Al-Mahmoud.
Police officials said they understand the religious duty of the Islamic faith to bury the deceased as soon as possible and are "working closely with the Chief Coroner to do everything possible to expedite the process".
Bishop of Polynesia - The Most Reverend Fereimi Cama said the Anglican Diocese of Polynesia unequivocally condemned this act of terrorism.
Police were able to neutralize two devices: an improvised explosive device at one of the mosques and another device found in the suspect's vehicle, which was also rendered safe. Another victim died later in Christchurch hospital.
"This individual was not on any watch list for either New Zealand or Australia", she said. In a rambling document that's dozens of pages long, he says he was inspired by Norwegian terrorist Anders Behring Breivik, who was responsible for the deaths of 77 people in 2011.
Questions have been raised about why Tarrant had not appeared on a watchlist of New Zealand or Australian security agencies.
"I can't even go to the mosque now because I am scared of that happening again", the 16-year-old told New Zealand television.
She said the main perpetrator used five weapons during his rampage, including two semi-automatic weapons and two shotguns, which he was legally licensed to own.
'But the Prime Minister has signaled that we are going to look at that issue [banning semi-automatic weapons]'.
"A category-A firearm holder can purchase the firearms without the magazines or the things that will enable them to be in the state that they were", Bush said.
Another of Daoud's sons, Yama, was on the way to the mosque - to make up with his father after a small falling out - when he bumped into a friend outside who told him "your father saved my life".