Mysteries in Daniel 12
Dan 12:11 "And from the time that the daily [sacrifice] is taken away, and the abomination of desolation is set up, there shall be one thousand two hundred and ninety days."
From the removal of the Al Aqsa mosque (daily sacrifice or call to prayer) which is at this very moment standing on the Temple Mount up to the dedication of the newly built 'Temple of God' (abomination of dedication is set up) for the Antichrist to proclaiming himself 'God' will be 1,290 days.
Dan 12:12 Blessed is he who waits, and comes to the one thousand three hundred and thirty-five days.
From the removal of the mosque to the blessed hope (Rapture), it will be 1,335 days.
Based on simple deduction, from the dedication of the temple where the Antichrist proclaims himself 'God' to Rapture will be 1,335 - 1,290 = 45 days
The Great Tribulation
Mat 24:15-16, 21 "Therefore when you see the 'abomination of desolation,' spoken of by Daniel the prophet, standing in the holy place (whoever reads, let him understand), then let those who are in Judea flee to the mountains... For then there will be great tribulation, such as has not been since the beginning of the world until this time, no, nor ever shall be."
From the dedication of the temple, where the Antichrist (abomination of desolation) is seen standing in the holy place to Rapture, will be the period of the great tribulations lasting just 45 days.
Dates of Important Events Prophesied
It is interesting that in the book of Daniel, we find prophecies of important dates to alert us from erring. In Daniel 9 we find:
1. Death of Messiah
Dan 9:25-26a "Know therefore and understand, that from the going forth of the command to restore and build Jerusalem until Messiah the Prince, there shall be seven weeks and sixty-two weeks; the street shall be built again, and the wall, even in troublesome times. And after the sixty-two weeks Messiah shall be cut off, but not for Himself."
From the command of King Cyrus to rebuild Jerusalem to Nehemiah completing the walls of Jerusalem was 7x7 years, and from the completion of the walls by Nehemiah to the crucifixion (cut off) of the Messiah (for the sins of the world – not for Himself) was 62x7 years.
Had the Jewish Priesthood understood and taken heed to this prophecy in Daniel, they would have taught and guided the Jews to believe our Lord Jesus after His death and be saved. Unfortunately, Satan has deceived the Priesthood and Theologians to demote the book of Daniel from prophetic to historic, resulting in the priesthood ignoring Daniel's prophecies.
Similarly, if Christians reject Daniel's prophecies, they too, will be deceived by the Antichrist (Satan) and Rapture will overtake them as a thief in the night.
2. Seven Year Peace Treaty
Dan 9:26b-27 "... And till the end of the war desolations are determined. Then he shall confirm a covenant with many for one week; but in the middle of the week he shall bring an end to sacrifice and offering. And on the wing of abominations shall be one who makes desolate, even until the consummation, which is determined, is poured out on the desolate."
The ending of the end time war in Mat 24:6-7 (World War 3) will be by the flood (great earthquakes causing extremely huge tsunamis) killing a quarter of all mankind. After World War 3, the Antichrist having subdued all nations will set up the 'One World Order' which will replace the ineffective UN with its abominable Human Rights section persecuting Christians for not accepting homosexuality and same sex marriage.
To deceive Christians, he will sign a 7 Year Peace Treaty to allow all Israelites to migrate back to Israel to rebuild the 'Temple of God'. Food, accommodation, clothes and good allowances will be provided to them. The Jewish Priesthood is given all rights to rebuild the temple which is fully financed by the state, as in the days of King Cyrus.
Please see Daniel's End-time chart below or at
https://www.time2alert.com/files/EC02Chart-Daniel_End-Time_Events.pdf