The Book of Revelation speaks of a harrowing period of time in three
distinct ways: first as 1260 days (12:6), then as three-and-a-half years
(12:14), and finally as 42 months (13:5). This intriguing variety of
expression used by the author leads, on closer examination, to some
interesting conclusions involving in particular a latter-day artefact:
the ISO standard A4 sheet of cut paper.
Details may be found under the heading "Exceptional Measures" at the URL
http://homepage.virgin.net/vernon.jenkins/index.htm
With all good wishes,
Vernon