Is there a way to automatically update Date&Time in Pages?

Hello!

I am finding myself using pages more and more over the past few months, and have been implementing the Date and Time feature within most if not all of my documents. I have my own personal templates that I uses daily, and would love to know if there is a way to have Date and Time update automatically upon opening the document/template. I have scoured the discussion boards to find a solution to this, but have yet to find one that works. I know at one point there was a check box that stated "automatically update date & time upon opening document"(or something close to that) but when I follow the directions to get to that check box its not there.

Currently running the newest version of pages 5.5 (2109) for Yosemite

MacBook Pro (Retina, 15-inch, Mid 2014)

If someone would be willing to answer this question, I would be greatly thankful!

Thanks,

Garrett