Nowadays, most dates in business correspondence are expressed like this: with regard to the agreement signed on 17 September 2012 . If you elect to use your own examples, however. they each need a comma before '2012'.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Perfect Strangerwell, so they're not incorrectThey are not good choices for business correspondence.