dd-mmmm-yyyy (01 January 2012) preferred for scholarly publications and periodicals because it comes of as professional (a comma in a written date is to "extraneous").
mmmm-dd-yyyy (January 1, 2012) preferred for fiction writing and personal correspondence because this format most resembles the way that dates are spoken.
yyyy-mmmm-dd (2012 January 1) preferred for official forms and documents that may need to be classified according to the year.
That being said I voted for mmmm-dd-yyyy because its what I'm use to in the good ol' US of A.
Bingo.
Poll
