Current date for extended form

I have a field date in a form where the end user loads the date of the form (it can be today, in the past or in the future)

I added the logic to display the current date, if it's empty

After designing the form, I open it with Adobe Acrobat Pro to Extend its features and enable the signature using Acrobat Reader.

At that moment, as the date field is empty, it is populated with the current date.

My problem is that when an end user wish to complete the form; as the date field is not empty, it always shows the date when the form was extended as default and not the current date.

How can I do to be able to extend the form features and that the date field assumes the current date ?

Regards

Nes