> Anyway, I decided to add a few attribute columns to exploder and
> was surprised to see the larger than expected choice of Date types

Those are "Windows properties", which only apply to some files, unlike the common file properties (attributes, size, the three timestamps etc) which apply to all files.

Which of those properties exist for a given file depends on the file type, the program that created it, and the Windows version and configuration. Nirsoft's PropertySystemView provides more details on the Windows properties associated with a file.

Cheers,
Liviu