@kensmosis - by default, the Date column contains the date the book was added to the library. However it can be changed manually (which would imply the column has been re-purposed), but AFAIK it cannot be extracted from a format file or downloaded
The Published Date columns can be extracted from a format file, my guess is that for a PDF, it would have to be in embedded XML as the Dublin Core Date element
The Modification Date is the date when the books metadata was last changed in the database, it cannot be edited or updated, other than by changing a books metadata.
If you want to see them in ISO format, then that can be specified in Preferences->Tweaks->gui_pubdate_display_format (search for date) - 'iso' will show as something like - 2015-12-25T10:54:29+11:00
BR
Last edited by BetterRed; 01-14-2016 at 08:22 PM.
Reason: typo
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