Hi Davide: on most of my pages Date of Modify code is correct... only on one page does it show the current date/time, and when I do a refresh in the browser, it continually gets updated.
The "Date of Modify" is a fixed string generated by the program when you export your page; by only refreshing the page in the browser (without exporting it) the "Date of Modify" in the page cannot change.
I suppose you are modifying (and exporting) your page so the Date changes.
Well, that's not the case for this page... please visit http://pragersoftware.com/purchase.php and you will see that each time you refresh the page, the "Date of Modify" changes! All other pages (index.htm is an example) that have that same code do not change.
Every time you call a PHP page, the webpage is generated by your servers PHP-parser. So the date of modify is right. The page is made over and over again.