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kensmosis - arrgh - you mean the file system dates
Sorry, I think of the file system and the operating system as two different beasties.
You're not going to like this - I don't think there is a way to wrangle mtime, ctime, atime, or dtime directly into calibre.
Calibre has two accessible standard date columns:
Date/timestamp and
Published/pubdate, the
Modified/last_modified column is a read only column.
If you were to put the create date (crdate) into the file name (via say a mass rename) then you could put that into
Published/pubdate via an add time regex - see
Preferences->Add Books->Configure metadata from file name.
The 'difficulty' with importing file system timestamps relates in part to: a) calibre supporting various file systems on various operating systems, b) there can be more than one format file for a book each with its own dates, and c) in most cases the file system dates bear no relationship to anything but when the file landed on my computer and what's happened to it since.
BR