One of the most misunderstood and misinterpreted time periods to be found in scripture is the time, times and half a time which is mentioned in Daniel and Revelation: Dan 7:25 And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until a time and times and the dividing of time. Dan 12:7 And I heard the man clothed in linen, which was upon the waters of the river, when he held up his right hand and his left hand unto heaven, and sware by him that liveth for ever that it shall be for a time, times, and an half; and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished. Rev 12:14 And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent.  The word time in this context refers to a period of a year. In the story of King Nebuchadnezzar, because of his pride, he went crazy for seven years and ate grass as an ox- Dan 4:32 And they shall drive thee from men, and thy dwelling shall be with the beasts of the field: they shall make thee to eat grass as oxen, and seven times shall pass over thee, until thou know that the most High ruleth in the kingdom of men, and giveth it to whomsoever he will. So on a literal level, time, times and half a time means time (1 year), times (2 years) and half a time (1/2 year) or 3 1/2 years. Most people who study Bible prophecy stop at this point and accept the 3 1/2 years only at face value. The period that this is generally attributed to by most people, is the last half of the 70th week of Daniel and the reign of the AntiChrist, which is proposed to be fulfilled at some time in the future. A Day Equals One Year The 70 week prophecy of Daniel 9:24, however, establishes a principle related to prophetic time that few completely understand. Virtually everyone acknowledges that the 70 weeks are not literally 70 weeks, but rather 70 weeks of years, or 490 years. The principle is that in Bible prophecy, you must substitute a period of a year in place of a day. This is the day=year principle. This equation is clearly established in scripture- Num 14:34 After the number of the days in which ye searched the land, even forty days, each day for a year, shall ye bear your iniquities, even forty years, and ye shall know my breach of promise. In this verse, a relationship between day and year is clear, each day will equate to a literal year. For the forty days that Israel spied in Canaan in unbelief, they would be punished by wandering forty years in the desert. Ezek 4:6 And when thou hast accomplished them, lie again on thy right side, and thou shalt bear the iniquity of the house of Judah forty days: I have appointed thee each day for a year. Here again, the equation is stated quite openly, a prophetic day represents a literal year. So to return to the 70 weeks of Daniel, you must first determine the number of days represented. Seventy weeks is 70 x 7 or 490 days, which will then equate to a literal 490 years in the fulfillment of the prophecy.