fearless, you posted this question in the Band Aide forum, not the PhotoMechanic forum; not many people will watch this forum at all. Better repost it at the appropriate PM forum.
What you see in the explorer is the file modification date/time. There are also date/times for creation date/time and last access date/time you could choose to show those too, but I doubt you really get what you want this way. Of course you could use PM's Tools|Adjust Date & Time to alter the modification time of the files, but every time you make alterations to the file, the file will get a new timestamp…
Cheers,
Hayo