Timestamp in notification email

New to Gravity and need a timestamp in the body of the notification email for auditing purposes. I've looked around and can't find a list of GF parameters, or syntax used to assign one to a dynamically populated field. {user:parm}

Gravity forms rocks!

Thanks in advance.

David:

I can manage PHP without much trouble. Is there some code I can drop in functions.php that will hand me the timestamp?

Thanks,
Toby