Gnome 3 has a menu bar that includes the day of the week and the time. The date and time settings allow the time to be shown in 24 hour or AM/PM style.
There do not appear, however, to be any options for displaying the date. Instead of "Thu 1:59 PM", I'd like it to read (for example) "1:59 PM, Thursday, March 28, 2013".
How can I configure the format of the date in the menu bar?