Whitman uses free verse to achieve effects impossible under even the broad restrictions of blank verse.

If a 12-hour clock is specified, the eighth field (the meridiem indicator) is required.[…]If this input string is entered, the parse still recognizes “feb” as the month name and “am” as the meridiem indicator, even though the format string specified both of these fields as uppercase, and the month name as unabbreviated.

2011, Richard Wagner, Building Facebook Applications For Dummies:

It is due to the efforts of CHAVANNES that the illustrations of the pillars belonging to the sepulchre of Wu are now made accessible, in his monumental work Mission archéologique dans la Chine septentrionale (two volumes, Paris, 1909); he has discovered further three other pairs of similar pillars in the district of Têng-fêng in Honan Province, dated A.D. 118, 123, and the third probably 123, respectively.