VIII. The days of the Tribulation will be Shortened (Daniel 12:11-12)

VIII. The days of the Tribulation will be Shortened (Daniel 12:11-12)
“And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.” (Matthew 24:22)
Many have questions about this portion of Scripture. It is referring to the “days” of the Tribulation Period and its total length. Commentaries don’t agree with each other and neither do pastors.
There is another giving of time recorded in Daniel 8:13-14, which also applies to the same period of time as Daniel 12:11-12. From the context, all have to do with the Tribulation Period of seven (7) years following the Rapture
The following is a brief outline concerning the number of days in reference to the Tribulation Period, as recorded in the book of Daniel. These references are found in Daniel 8:13-14 and Daniel 12:11-12.
We do know that the Antichrist makes a covenant with Israel in the first part of the Tribulation, allowing them to worship in their Temple and offering them perpetual peace (Daniel 9:27). In the middle of the Tribulation, after 3 ½ years, he breaks the covenant with Israel and seeks to destroy them all.
This is the “Abomination of Desolation” spoken of in Daniel 9:27 and amplified upon in Matthew 24:15-22. The verses we are reviewing in Daniel 8 and Daniel 12, are in reference to the last 3 1/2 years of the 7-year Tribulation Period, known as the GREAT Tribulation.
The following diagram on Page 180, and explanation, should illuminate these verses in their proper context.
In Daniel 12:11 we are told that
"…FROM THE TIME that the daily sacrifice shall be taken away..."
Since the daily sacrifice is taken away by the Antichrist in the middle of the Tribulation; i.e. after 3 ½ years, we know these Scriptures are dealing with the last 3 ½ years of the Tribulation. The same is true in Daniel 8:13,
" …concerning the daily sacrifice and the host (Israel) to be trodden underfoot.”
In Daniel 8:14 we find the answer to verse 13, by recording a number of days concerning the last half of the Tribulation Period. Here is the record:
"And he said unto me, unto two thousand and three hundred days, then shall the sanctuary be cleansed." 
The Sanctuary will be cleansed by the coming of Christ at the end of the Tribulation. After the Antichrist breaks his covenant with Israel in the middle of the Tribulation, he goes into the Temple and declares himself to be God (2 Thessalonians 2:3-4) and demands all to worship him by taking his mark,"666" (Revelation 13:16-18).
When Christ returns, He will chain Satan for 1,000 years. (Revelation 20:2-3) Christ will then sit on the Throne and reign as King of Kings for a 1,000 years; after which He will create New Heavens and a New Earth.
Notice, in Verse 14 the word "days" does not appear in the Majority Text. The Hebrew reads "evenings and mornings," instead of “days.” This is referring to the sacrifices offered—one in the evening and one in the morning (Exodus 29:39). The evening and morning sacrifices constituted one day. Therefore, having 2,300 evening and morning sacrifices would constitute 1150 days, which would equate to 3 years, 2 months, and 10 days. Remember, in prophecy we always figure 30 days to a month—as in the Jewish calendar. 
Now, let us go to Daniel 12:11-12.
"And from the time that the daily sacrifice shall be taken away, and the abomination that maketh desolate set up, there shall be a THOUSAND 'TWO HUNDRED AND NINETY days." (3 years and 7 months.) (Daniel 12:11)
"Blessed is he that waiteth, and cometh to the THOUSAND THREE HUNDRED and FIVE and THIRTY days." (3 years, 8 months, 15 days). (Daniel 12:12)