Daniel had been in exile with his fellow Jews for nearly seventy years when Babylon was invaded by Darius the Mede. During the first year of Darius’ reign, Daniel was reading Jeremiah [25:12 and 29:10] and realised the seventy years of Israel’s exile were nearly complete and prayed concerning it. During his lengthy prayer for his people, the angel Gabriel came and gave Daniel a prophecy involving seventy weeks, which are seventy weeks of 360-day-years , representing Israel’s destiny. The angel Gabriel said to Daniel At the beginning of your pleas for mercy a word went out, and I have come to tell it to you, for you are greatly loved. Therefore consider the word and understand the vision [Daniel 9:23]. The seventy week prophecy followed in verses 24 to 27. Dan 9:24  Seventy weeks are decreed as to your people and as to your holy city, to finish the transgression and to make an end of sins, and to make atonement for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the Most Holy.   25  Know therefore and understand, that from the going out of the command to restore and to build Jerusalem, to Messiah the Prince, shall be seven weeks, and sixty-two weeks. The street shall be built again, and the wall, even in times of affliction.   26  And after sixty-two weeks Messiah shall be cut off, but not for Himself. And the people of the ruler who shall come shall destroy the city and the sanctuary. And the end of it shall be with the flood, and ruins are determined, until the end shall be war.   27  And he shall confirm a covenant with many for one week. And in the midst of the week he shall cause the sacrifice and the offering to cease, and on a corner of the altar desolating abominations, even until the end. And that which was decreed shall be poured on the desolator. Verse 24a: “Seventy weeks are decreed": In ancient Hebrew, weeks simply referred to a unit of seven. The Hebrew word here is often used to mean a unit of seven days, but it may also be used for a unit of seven years. The Jews’ years were divided into weeks of years, each week containing seven years, the seventh year of which was a Sabbath year. This numbering (or counting) system was introduced by God to Moses to organise their agricultural system which allowed six years of planting and harvesting followed by a year when the land was rested [Leviticus 25:1-7] . After seven cycles of these seven years, there was to be a Year of Jubilee in which all land was restored (where relevant) to its original owner and all slaves were set free [Lev 25:8-10] . It was quite natural, then, for a week to be understood as a week of years, particularly because the Hebrew translated as “seventy weeks” literally means “seventy sevens” The Seventy Weeks of Daniel, then, is a prophetic roadmap of highly significant events from the ending of the Jewish exile in Babylon to the second coming of Jesus. In summary: Verse 24 gives the scope of the prophecy, 70 weeks (= 70 x 7 years) Verse 25 gives the first 69 weeks and is the period between Artaxerxes’ decree to rebuild Jerusalem in 445 B.C. [Neh 2:5-8], and Jesus’ triumphal entry in Jerusalem in 32 A.D. [Mat 21:1-9]. Verse 26 speaks of a period of unknown length between the 69th and 70th weeks during which the Messiah is executed, Jerusalem is destroyed (AD 70) and the Diaspora follows. We know we are in this period of unknown length because not all the conditions of Daniel 9:25 have been met: to finish the transgression and to make an end of sins, and to make atonement for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the Most Holy. Verse 27 speaks of the 70th week during which there will be a covenant enforced, but it will be interrupted half way through when sacrifices and oblations will cease and an abomination will desolate the Holy Place [ Mat 24:15; 2 Thes 2:3,4 ]. Then the great tribulation will begin [ Mat 24:21 ], which precedes the Messiah’s second coming at the end of the 70th week.