Insert > Fields and Variables > Date?
In thinking further on this it occurs to me that what I proposed won't really work. What it will do is insert the current date into the topic.
I did a brief Google and found the following page that may help you accomplish this.
Ya - I've been looking into this as well and there are 2 things that will prevent this from working:
1) When RH generates the final output (in the !SSL! folder), the last modification date of those output files becomes whatever the date/time is at the time they were generated.
2) Even if i could get # 1 to work, I then do a robocopy operation to copy this output to sharepoint (where we host the help files) which sets the last modified date of those files on sharepoint to be the date/time of the copy on sharepoint (this seems to be different behaviour then when robocopy copies files to a local disk).
In anycase - what i really need is a way to "bake" this information before the files are compiled... unfortunately it looks like i'll have to manually do this with the Insert->Fields and Variables->Date method....