> Thank you for clarifying my understanding. It sounds like Koha will simultaneously pull and display copyright date information from more than one MARC subfield and that's great. What would happen if a MARC record only has, for example, a 264$c and no 260$c? Will Koha throw an error if it encounters scenarios like this? I hope that those questions do not sound stupid.

No problem. Koha will handle it fine. 264c and 260c will always be 'alternating'.

> As far as non-MARC data is concerned, if Koha can pull copyright date from two MARC subfields, then it stands to reason that it could pull the date from two MARC subfields and a Dublin Core field/element, yes?

Yes, but I keep this thread to Koha<->MARC now. Obviously, we can pull other data too in some future scenario.