To all who have recently engaged me on this thread,
Responses are forthcoming as time permits. I will seek to take each engagement in the order that it was delivered. However, time will be needed for each response to be prepared and presented.
1. Concerning your comment that it is called "discussion."
Indeed, it is called discussion. You initiated the discussion with your discussion question. I engaged in the discussion with a corrective to your discussion question, indicating that it was somewhat inaccurate and thus somewhat irrelevant to the context of Daniel 9:24-25.
However, you will also notice that although I myself believe your question to be somewhat inaccurate and irrelevant to the context of Daniel 9:24-25, I did in fact put forth the effort to research and report an answer to your discussion question, as per the following:
As far as anything that happened historically around that time period, that may have had an impact upon the children of Israel -- According to Daniel 9:1 the events of this chapter occurred "in the first year of Darius the son of Ahasueres, of the seed of the Medes, which was made king over the realm of the Chaldeans." In relation to this Daniel 6:28 seems to indicate either that this reign of Darius the Median over the realm of the Chaldeans was concurrent with the reign of Cyrus the Persian over the whole kingdom of Persia, or that this reign of Darius the Median (since he was 62 years old when he began to reign, as per Daniel 5:31) lasted only a short time and was quickly transferred to the reign of Cyrus the Persian. Now, according to Ezra 1 it was in the first year of Cyrus king of Persia that he made the decree for the temple in Jerusalem to be rebuilt. For me, the most interesting aspect of this historical information is that Daniel himself would have lived long enough to know of Cyrus decree to rebuild the temple in Jerusalem, since Daniel himself was still alive at least until the third year of Cyrus king of Persia (as per Daniel 10:1).
2. Concerning your comments about the contextual flow of thought in Daniel 9 that precedes Daniel 9:24-27.
Yes, Daniel was indeed "studying about Jeremiah's prophesy" (as per Daniel 9:2); and it does appear that he was looking with expectation for the 70 year Babylonian captivity to be soon ending. In fact, in Daniel 9:2 he declared that he possessed understanding from and concerning the prophetic utterances of Jeremiah concerning the years of the captivity. Thus Daniel was not moved to engage in his prayer of confession and supplication because he lacked understanding. Rather, he was moved to engage in his prayer of confession and supplication specifically because possessed understanding.
Furthermore, in the supplication portion of his prayer, Daniel did not present a request for understanding. Rather, he presented a request for the Lord God's merciful forgiveness and favor to be poured out upon the children of Israel, upon the city of Jerusalem, and upon the temple in Jerusalem, as per the following in Daniel 9:16-19:
"O Lord, according to all thy righteousness, I beseech thee, let thine anger and thy fury be turned away from thy city Jerusalem, thy holy mountain: because for our sins, and for the iniquities of our fathers, Jerusalem and thy people are become a reproach to all that are about us. Now therefore, O our God, hear the prayer of thy servant, and his supplications, and cause thy face to shine upon thy sanctuary that is desolate, for the Lord’s sake. O my God, incline thine ear, and hear; open thine eyes, and behold our desolations, and the city which is called by thy name: for we do not present our supplications before thee for our righteousnesses, but for thy great mercies. O Lord, hear; O Lord, forgive; O Lord, hearken and do; defer not, for thine own sake, O my God: for thy city and thy people are called by thy name."
Therefore, the message of Daniel 9:24-27 was not delivered unto Daniel in order to answer any request on his part for understanding. Rather, the message of Daniel 9:24-27 was delivered in order to reveal the Lord's intended answer into the future concerning Daniel's request for merciful forgiveness and favor upon the children of Israel, the city of Jerusalem, and the temple in Jerusalem. Indeed, that is the very reason that Daniel 9:24 begins with the main clause -- "Seventy weeks are determined upon thy city and upon thy holy city."