Dating is complex and mysterious in the Book of Revelations-dating,
not in the sense of Biff and Jenny grabbing a movie after milkshakes
at Denny's, but dating in the sense of time and space: gauging when
and where events occur in the space-time continuum.
Adding to the complexity is the fact that a string of events occur
in the Apocalypse in pairs, throwing off all dating systems that
seek to frame Biblical time elements into a neat, tidy Newtonian
system. Such systems would work if John, the apocalypter, were
describing a single, continuous orgy of natural disasters ending
with the Battle of Armageddon. The problem is that the Apocalypse
isn't Newtonian; it doesn't follow a linear time line. The
Apocalypse is almost circular in shape--hyperdimensional.
For instance, in Rev. 14:8 an angel declares Babylon has fallen.
Then it apparently falls again in 18:2. In essence it falls twice.
Another example of "pairing" is the double appearance of the
Spiritual Man "who was to rule all nation with a rod of iron"; he is
born in 12:1 by the Spiritual Woman, caught up to heaven, then
reappears as a full-grown man in chapter 19 to fight the great magic
battle, Armageddon. The Spiritual Woman enters the cosmic stage in
Rev. 12:1, un-named and un-identified until this female figure makes
a mortifying transformation to become the Whore of Babylon: MOTHER
OF ALL HARLOTS AND ABOMINATIONS OF THE EARTH.
The obvious conclusion one must draw is that the seeds of Babylon's
destruction was sown within the heart of man, before it falls
in "actualized" space-time.