[Blogs] Date of blog posts displayed in french and english

When you are on the "last blog posts" view, the date displayed is :

• with a french browser : "Friday 12 février 2010"
• with an english browser : "Friday 12 February 2010".

When you are on the blog post, the date is :

• with a french browser : "12 févr. 2010"
• with an english browser : "12 févr. 2010 ".