The window of November 24-26, 2016 A.D. is based on the fulfillment of the 1,335th day of Daniel 12:12, Ascension Sunday, May 8, 2016 A.D.
For those of you who are not church goers and are unfamiliar with prophecy and interpretation, the regular format for the first half of a Sunday service is centered upon what is called the Liturgy of the Word.
The focal point of the Liturgy of the Word is a reading from the Harmonious Gospels of the Holy Bible (the prophecy part).
The reading is then usually followed by a sermon based upon that reading (the interpretation part).
The difference in the Book of Daniel is that the prophecy was given more than 2,500 years ago (especially as regards chapters 11 & 12) and then the prophecy was closed and sealed. (cf. Daniel 12:4 & 9)
So one could say that this recent opening and unsealing makes for one of the oldest/longest prayer meetings/church services on record.
One can also see a great parallel in the development of the mystery novel since the prophecy was given as having a direct basis in the protocol of the Book of Daniel.
All the kings foretold in chapter eleven of the Book of Daniel were born in the 20th century (A.D.).
This makes for a great dichotomy in all efforts previous which did not take such specifics into account, and as such were not really interpretations at all, merely conjecture.
There is an article at Wikipedia devoted only to attempts that failed to interpret the major day countings of the Book of Daniel.
The major day countings to which I refer are : Daniel 8:14 of 2,300 days; Daniel 12:11 of 1,290 days; and Daniel 12:12 of 1,335 days.
The reckoning of 1,260 days is found in chapter nine (repeated in chapter twelve) and centers upon Christ's death in the middle of the 70th week of what is called the 70 weeks prophecy (actually 70 weeks of years, or 70 x 7).
The developments since November 8, 2012 A.D. have come to fit together like pieces of a giant jigsaw puzzle.
The window of November 24-26, 2016 A.D. for the Three Days of Darkness is not solely based on the 2,300 days of Daniel 8:14, though I find that such a basis is sufficient purely from a legal standpoint; it also includes Scriptural attributes of our Creator as shown in both the Old and New Testaments of the Holy Bible in that Our Lord would be shown to be simply tarrying if the window is any later; however, that, too, is His prerogative, but does not jive well with what would best be described as His healthy colic.
To describe it another way, if the window of November 24-26, 2016 A.D. is moved to a later point in time, God is, literally, doing 'burn outs' like body builders do, and it is purely a matter of when He will have had enough of that.
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St. Elijah (cf. §784, Catholic Catechism),
St. John the Baptist (cf. §785, Catholic Catechism),
Edward Palamar Popovich (cf. §786, Catholic Catechism),
the Resurrected Prophet of the Most High (Luke 1:76),
whom Jesus Christ calls "the Elias who was to come" (Matthew 11:14),
enjoying the rapture of Christ's love in the duty of
Petrus Romanus (Peter the Roman, cf. St. Malachy Prophecy),
the Sign of the Son of Man in Heaven (Matthew 24:30)