"Language is active. You can learn the learn te reo, yet speaking is the active part."
Staff member Leigh Marama McLachlan thought it was wonderful hearing two of her team members, including her manager, only speak Maori this month.
She said it was about being patient and working together for the greater cause, which is to normalise te reo Maori.
"There have been times when I haven't fully understood their instructions, and we laugh it off and help each other out.
"Speaking te reo Maori can change the tone of anything. It is a very calming language to hear and I would love it if this much te reo was spoken at work always."
The challenge was created three years ago by language expert Paraone Gloyne, and is run today by Te Wananga o Aotearoa. Nearly 500 people around the country took part in the challenge.
Staff at Te Puni Kokiri had the backing of their co-workers and senior management.
The Mahuru Maori challenge finishes tomorrow.