The Prime Minister has been driving the whole flag debate, and he got some high-powered backing earlier this week when All Blacks captain Richie McCaw indicated he's in favour of change.
So what are the John Key's chances of succeeding with his push for a new flag?
3 News political editor Patrick Gower says if the country votes against it, that would be an "epic fail".
"In some senses it's not just a referendum on the flag – it's a referendum on him, a referendum on the power of Brand Key… and it feels like people aren't that interested in this."
But with 700,000 views on Facebook of his video where he explains why the flag should change, an upset could be on the cards.
Watch the video for the full chat with Patrick Gower.