creation time of a file?

I know that the Unix faq says that the creation time is not stored.
 http://www.faqs.org/faqs/unix-faq/faq/part3/section-1.html

And I don't see it mentioned in inode(5) or statfs(2).

But I see that
http://www.dickinson.edu/~braught/courses/cs354f97/Classes/Class21/Class21LN.html
mentions a creation time in a 4.4 BSD Unix I-Node and also says a
"generation number" field is based on the creation time of the file.

Did the creation time used to be stored?

Is there a "generation number"? And if so can the creation time of a file
be figured out from it?

 Jeremy C. Reed

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