Re: Have a printed date and time stamp on pdfs.

Create a text field, let's say it's called "PrintDate". Then go to its Properties and under the General tab select "Form Field: Hidden but Printable".

Now go to Tools - JavaScript - Document Actions and enter the following code as the Will Print event:

this.getField("PrintDate").value = util.printd("mm-dd-yyyy HH:MM", new Date());

This will cause the field to update with the current date and time just before the file is printed.