Bible Numbers:

The Prophetic Calendar

How the Leap Months are Regulated in the Prophetic Calendar

The 30-day leap month is added every 6th year, with every 7th cycle being adding on the fourth year, thus concluding a 40-year cycle. Every 4000 years it is omitted. Such a system keeps up to our solar calendar with amazingly accuracy, and divides the ages into even bible-generations of 40-year periods (and 4000 too). This will be detailed in a later document.

• 6 x 360 + 30 = 2,190 days (2,190 ÷ 365 = 6 solar years)
• 6 x 6 = 36 years (= 2,190 x 6 = 13,140 days, ÷ 365 = 36 solar years)
• 6 x 6 =36 years, + 4 years (i.e., the 7th cycle) = 40 years (36 + 4 = 40 years)
• 36 years (13,140 days) + 4 years (1,440 +30 = 1,470 days) = 40 years  (14,610 days)
• 14,610 days ÷ 365.25 = 40 solar years

• 365.25 - 365.2422 = .0078 days, x 4000 years = 31.2 days 

Compare the above 40 and 4000 year-cycles (of the prophetic calendar) with our own modern-day calendar that is based on a leap day added every 4 years, but omitted three times per 400-year cycle, except every 4000 years!  ("40" is a number often used in relationship to time in the bible, i.e., "a generation")

Briefly, the said regulation of leap months of the prophetic calendar, is confirmed by the Bible in the following way:

1. Bible scholars agree that the 1290 days of Dan. 12:11 represents one of the halves of the last of the seven-year period of Daniel's 70 x 7 (490) years , i.e., 483 + 3 ½ + 3 ½  = 490.
2. There are 12 generations of 40 years every 480 years, and thus a total of 84 leap months added, (7 cycles x 12 = 84).
3. 84 leap-months = 2,520 accumulated days (84 x 30 = 2,520).
4. 2,520 days = 1260 x 2 (or 3 ½ + 3 ½ = 7 years, cf., Rev. 11:2,3, 12:6).
5. "480 years" is the same figure given in 1Kgs. 6:1, which begins from the commencement of the new calendar month and year given to Moses at the time of the exodus from Egypt (Ex. 12:2). This is the only direct reference in the bible to an official start of a new calendar-year, and 480 years is the only definite period of time revealed to us that declares what is the span of time between the exodus and the kings of Israel. 
6. Many scholars acknowledge an obvious relationship between the 480 of 1Kgs. 6:1 and an even 12 generations of 40 years (12 x 40 = 480 years). For instance, note the 40 years in the wilderness after the exodus, and the 40-year reigns of Saul, David, and Solomon---the first three kings of Israel. Hence, there is concord between these 12 generations and the twelve 40-year leap-month cycles.
7. Thus after 486 years, there are 85 leap-months, or 1260 + 1290 days; (see point 2 & 3).
8. Thus the 1260 + 1290 accumulated leap-months (every 486-years) happens  to be the same length of days as the 1260 + 1290 that occurs at the point of the 486.5 years of Daniel's divided "week"!!! (see point one.)
9. The .5-year difference between the 486 years of the leap-months, and the 486.5 of Daniel is accounted for by reason of when each had their starting point. I.e., was the first new year in the spring or fall? (The fine tuning of Edwin Thiele's chronology of the period of the kings, for instance, relies heavily on the assumption that the biblical record is vacillating between these two new-year starting positions.)
10. As said, there are 480 years between the exodus/tabernacle (1446/5 BC) and Solomon's temple (966 BC), which yield an accumulation of 84 leap months, or 1260 x 2 days. This sets a pattern, for from the exodus till Christ (when God "tabernacled" among us, Jn. 1:14, 2:19) there are 480 x 3 years (i.e., unto 6/5 BC), or 126 x 2 accumulated leap-months, etc. 

Of the four possible decrees that begin the terminus a quo of Daniel's 70 x 7 (490), Cyrus' decree of spr. 458 BC (spr. 458 to spr. 457) is the most convincing numerically. (The NIVSB also favors this choice in it's margin, by the way.)

1) Autumn, 458 BC + 486.5 yrs of solar cal.  = Spr. of AD 30 (most popular date for Christ's crucifixion among scholars, with a 3.5-yr ministry preceding)

2) or, decree of Spr., 458 BC + 490 years of solar cal. = Spr. of AD 33 (2nd most popular date for Christ's crucifixion among scholars, with a 3.5-yr ministry preceding)

3) Compare with the following:

• 1446 BC (exodus) + 480 x 3 Yrs = 6 BC (c. birth of Christ), = 252 accumulated  leap months, (or in other words... 126 x 2 months, or 1260 x 6 days, or 21 yrs of 360 days)
• Therefore, spr. of 6 BC is a leap month, as is AD 1 (the "0-year" is non-existent),  AD 7, 13, 19, 25, 31, and AD 35
• Therefore, if the 3 ½ yrs of Christ's ministry was from Aut., 26 to Spr. of AD 30, than it would have had 1260 days in it
• if the 3 ½ yrs of Christ's ministry was from Aut., 2 to Spr. of AD 33, than it would have had 1290 days in it, with that lunar cycle being the 258th, which is 129 x 2 (or in other words, 1290 x 6 days, or 430 x 18 days, or 21.5 yrs of 360 days)

Hence, there is an alignment of the number of leap-months from the exodus, with the 3 ½ yrs (1260/1290 dys) of Christ's ministry, and with the 490 of Dan. 9:27. Compare this with the following...

We said that every 40 years, 7 minor lunar cycles are completed, but every 4000 years the leap-month is omitted. Thus there are yet larger 4000 yr-cycles as well as the 40 yr. (Note that 4000 is 40 x 100---both of these numbers can refer to a generation in the Bible. Also note that the Israelites were "400" yrs in Egypt (Gen. 15:13-16), but "430" to be exact, (Ex. 12:40).

Thus, 1446 BC (exodus), + 4000 yrs = AD 2555, which is 1260 + 1260 years from AD 35; 1260 + 1290 years from AD 5, and 1290 x 2 from 26  BC (i.e., "mirror" of AD 26). See "A Day can Equal a Year."