"National and Act are hoping you will avert your eyes," the advertisement reads.
In response, a spokeswoman for Associate Education Minister John Banks said PPTA's claims were "unfounded" and there is no need to change the closing date for submissions.
It is now over one year since the Government submitted its intention to introduce partnership schools, the spokeswoman says.
That's true, and the issue has been hotly debated since then, but when legislation is before Parliament it is the official submissions that count.
In my view, the union is correct that the timing will likely have an impact on the number of submissions received, many concerned citizens will be too preoccupied with other things to notice the deadline.
In a similar vein, readers may recall that MPs were awarded a 1.9 per cent pay rise just in time for Christmas.
As one commentator pointed out, MPs' pay rises were typically announced around that time of year. It's part of what's known as the "end of year dump" of negative headlines that politicians hope will slip past a busy public.
The same could be said of this deadline for submissions.
As the PPTA's advertisement points out family time, down time and trips away are the main things on most people's agendas at this time of year and it is likely that even the most strident critic or supporter of the charter schools proposal could be caught off guard by the timing of the closing date and might miss the opportunity to have their say.
If, as the Government maintains, this was not a cynical attempt to limit opposition then it should extend the closing date to give people an opportunity to have their voice heard.