Well, if you would like to know the exact date someone completes a form you have shared, then you can add a text field to your PDF form that will add the current date automatically. The catch is that it is a bit tricky process if you are not from a technical background. This process involves the usage of simple JavaScript at the page level. However, it is a two-step procedure. The first is to insert the date field to your PDF and then insert the JavaScript to the Page Properties.