[jzwinck]

Using the latest date may work against you, because someone else can show that they produced a work in 2013 with verifiable documents and if your documents say 2014, they will appear to have published earlier than you. If you're going to use a year, use the year the content was created.

[nodesocket]

Interesting, huge companies seem to only use the current year:

   © 2014 GitHub, Inc.
   © 2014 DigitalOcean ™ Inc.
   © 2014, Amazon Web Services, Inc. or its affiliates. All rights reserved.
   Facebook © 2014
   Copyright © 2014 Tesla Motors, Inc. All rights reserved.

We leads me to believe it does not matter.

[mikk0j]

Interesting indeed, that goes against the grain of what I read here in opinions and links. So maybe it does matter? Thanks for the list.