XSLT: Get timestamp

Hello Guys,

I have a requirement in my project which says that I have generate a
timestamp (now()) inside my XSLT.

I searched newsgroups, google, books and tutorials, but I couldn't find
a way to implement it.

What do you say?

Is it possible?

Or should I implement a extension to my XSLT engine?

Thanks in advance,
Marco Campelo