bug#14613: Date -- incorrect invalid date

[Chris F.A. Johnson]

$ date -d '2 June, 2013'
date: invalid date `2 June, 2013'

  This should be accepted, just as 'June 2, 2013' is.

--
   Chris F.A. Johnson, <http://cfajohnson.com/>
   Author:
   Pro Bash Programming: Scripting the GNU/Linux Shell (2009, Apress)
   Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)