I believe the following are all valid uses of string->date, but each results
in an error that char-alphabetic? expects argument of type <character>; given
#<eof>.

    (string->date "2000 1 March" "~Y ~d ~B")
    (string->date "2000 1 March Wednesday" "~Y ~d ~B ~A")
    (string->date "2000 1 Mar" "~Y ~d ~b")
    (string->date "2000 1 March Wed" "~Y ~d ~B ~a")

David