suggestion: -newer-than option that takes a date

[Eric Hanchrow]

find 4.1.20 takes a "-newer" option that lets me specify a file; find will then
tell me about files that are newer than it.  But I often want to find files that
are newer than a particular date; in order to get what I want, I have to create
a temporary file, and use "touch" to set its last-mod timestamp to the date that
I want, and then give that temporary file's name to the "-newer" option.  This
seems a bit kludgy; it would be convenient if "find" could parse dates itself,
and simply allow me to give the date I want as an argument.