You'll love the Daniel book, RF. It should have come with a pocket for a calculator cuz their prophetic math is questonable. Page 301 is one of my favorites to usher them to. Several of their time periods there just don't add up. Example:
June 1 or 15, 1938 til October 8 or 22, 1944 is counted by them as 2300 days. A few quick strokes on the calculator and a bit of research into leap years (1940 and 1944 are leap years) brings the prophetic period stated to 2322 days.
Going to p.177-179 gives you their take on how it is calculated, along with a misleading parenthetical insert on p.178 that it is '6 years, 4 months, and 20 days on the Hebrew calendar' (funny thing though is that the Hebrew calendar was a lunar calendar of 354 day years with a leap month approx. every 3rd year).
To me, a 2300 day prophesy should be 2300 days (or maybe years) long and no longer no matter what calendar you use. A day is a day is a day. But, to give them the benefit of the doubt, I switched over to the Hebrew calendar provided in their 'Insght' book and started my count in June ( Sivan in Hebrew for June 8th). Sure enough, 6 years (354x6=2124 plus two years with a leap month of 30 days each, 2124+30+30=2184), 4 months (two months, Sivan and Ab are 30 days long; the other two are 29; so 30+30+29+29=118), and 20 days is.............................................................................2322 days.
The only error I can possibly find in the calculation is I can't determine with certainty whether Veadar, the leap month, is 30 or 29 days long.
Enjoy the book. It should keep you busy for months.