you may find this thread of some use created date parameter
The date is a SolidWorks parameter (as is Description) & I believe is how it is on the default templates unless yuou change it. If you edit the sheet & roll over the date, you wil see that it will show up as a SolidWorks parameter as below. You need to delete this & add it again as a created date parameter as shown in Bjorn Hulman post.
I have my Drawn date as a Custom Property that I need to fill out, however I fill out the date in the Custom Property Tab Builder... The only "Live" date we want is I use the Short Date for out Print Date, and the Long Date as our Saved As Date..