Add expiration date to PDF header/footer or watermark

[justin.arnold2]

I am searching for a solution that will allow me to add a document
expiration date to the header/footer or in a watermark of multiple
PDF's. When a user opens a pdf I need the header/footer or watermark
to display the date 45 days from now. If the document was opened today
I need the header/footer or watermark to read:

This document expires on 2/25/11.

I've not had much success finding an answer for this anywhere online
and would appreciate a response if anyone has solved a similar issue
like this in the past.

A header, footer or a watermark is all that I'm looking for. We're
working with controlled documents and when a user prints the PDF we
need the exact expiration date to show up on the printed copy. Since
there are thousands of documents that this needs completed on it is
not possible for me to make individual changes to each one. I need a
batch solution that will allow me to make this change all at once, if
possible.

Thanks in advance for your assistance.

[Ashish]

Hi Justin,

While I do not know the accurate answer, I know it is easily possible.
Here is what a quick Google search that would help you:
http://www.google.com/search?q=insert+current+date+in+pdf
Some results talking about Acrobat JavaScript might be worth exploring
too, like this: http://www.planetpdf.com/developer/article.asp?ContentID=6828

PS: You can add 45 days to 'current' date in the given examples/
scripts.