Dan 9.24-27
The Great Tribulation that Christ speaks of is only the last half of the Tribulation or 3 1/2 years. The abomination that causes desolation is at the mid point of the week, and the Great Tribulation follows that. For those who consult the Bible during the Tribulation will be able to calculate the time of Christ's Second Coming.
I subscribe to the literal interpretation method, and I am a Dispensationalist.
Dan 9:24 Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.
God gave Israel 490 years to repent after their 70 year captivity in Babylon when the Medes and Persians conquered Babylon (Chaldeans) around 538 B.C. They were allowed back in the land and to rebuild the city of Jerusalem, however, they still did not repent for their sin of idol worshiping as they continue to follow Judaism and receive punishment from God as the kingdom was taken away and eventually taken over by the Roman Empire. Malachi Chapter 1-4.
The people were allowed back in the land and Israel was again formed; however, the people did receive punishment as the kingdom was taken away. Additionally, for approximately 2500 years, from 586 BC until 1948, the nation was under the authority of a foreign power. Israel never again had a king from the messianic line of David to sit and rule.
Israel was given 490 years to deal with the sin of the nation and prepare for the coming of King Messiah. The prophecy would start with the command to restore and rebuild Jerusalem. Messiah, the prince, would come exactly 483 years (69 weeks) after the command was given. Then the Messiah would be cut off or killed for others. After the 69 weeks, Messiah would be killed, and Jerusalem and the temple would once again be destroyed and made desolate. There would be wars and desolation of Jerusalem for an unspecified period of time and then the end would come. This prophecy allows for the exact time for the first coming of Messiah to be determined.
Daniel separated the 70th week, the last seven years, from the previous 69 weeks. The 70th week was specially separated from all the other years. This prophecy gives conclusive proof that only Jesus of Nazareth can be Israel ’s King Messiah, the Savior of mankind.