One option is to use the Library Setting, "Format Dates with this pattern", but it's a sledgehammer that would affect almost every displayed date in the staff client.
The codes for this are better documented here: http://dojotoolkit.org/reference-guide/1.10/dojo/date/locale/format.html You'd want four consequtive capital E's. For example, "EEEE, MMM d, yyyy" in that setting would give you dates like "Thursday, Oct 1, 2015" -- Jason Etheridge | Community and Migration Manager | Equinox Software, Inc. / The Open Source Experts | phone: 1-877-OPEN-ILS (673-6457) | email: [email protected] | web: http://www.esilibrary.com
