Consider the following sentence:
In July of 2012 Jesse informed us that she was engaged to be married and asked if she could add her fiancée to the lease, beginning the 15th of August 2012.
Is it any more or less correct to place a comma after the first date?
In July of 2012, Jesse informed us that she was engaged to be married and asked if she could add her fiancée to the lease, beginning the 15th of August 2012.
Assuming one is no more correct than the other, does this change the meaning of the sentence, or is it pure style?
Bonus question: Word tells me that it's improper to place a comma after the "August" at the end of the sentence. I've always been taught that a comma should be used to separate the year from the rest of the date. Was I taught wrong, or is Word lying to me?