"So, I encourage everybody to get involved and sign this open letter to show Te Matatini and the minister our plea. The time has come."
'Change the name'
Waititi says the petition to change the country's name to Aotearoa will be brought to Parliament this week.
"We are still waiting for artist Hohepa Thompson's Hori's Pledge - This is Aotearoa. Once he has finished, we will be pushing forward to Parliament."
"I urge everyone from today to Thursday to support this pledge, to further cement our Māori language on to this land by changing the name New Zealand to Aotearoa and also support the Te Matatini petition in the hopes to elevate our language to that of our ancestors' aspirated it be."