Change name of PDF

Hello, I have integrated the PDF to forms.
It works, but, the file is the name of the form, no problem. But there is a number (I call it ID) at the end of the file name. Is it possible to change this ID to (for example) date and time? Because the person who filled in the form gets this pdf and doesn't understand the meaning of the ID. But date and time is not difficult to understand.

Regards, Peter

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