Awake! 1966 October 8 pp.19-20 "How Much Longer Will It Be?"
"Hence, the fact that we are nearing the end of the first 6,000 years of man's existence is of great significance. Does God's rest day parallel the time man has been on earth since his creation? Apparently so. … In what year, then, would the first 6,000 years of man's existence and also the first 6,000 years of Gods rest day come to an end? The year 1975. This is worthy of notice, particularly in view of the fact that the "last days" began in 1914, and that the physical facts of our day in fulfillment of prophecy mark this as the last generation of this wicked world. It means that within a relatively few years we will witness the fulfilment of the remaining prophecies that have to do with the "time of the end"
Life Everlasting in Freedom of the Sons of God 1966 pp.26-30
"The published timetable resulting from this independent study gives the date of man's creation as 4026 B.C.E. According to this trustworthy Bible chronology six thousand years from man's creation will end in 1975, and the seventh period of a thousand years of human history will begin in the fall of 1975 C.E. So six thousand years of man's existence on earth will soon be up, yes, within this generation. … So in not many years within our own generation we are reaching what Jehovah God could view as the seventh day of man's existence. How appropriate it would be for Jehovah God to make of this coming seventh period of a thousand years a sabbath period of rest and release, a great Jubilee sabbath for the proclaiming of liberty throughout the earth to all its inhabitants! This would be most timely for mankind. It would also be most fitting on God's part, for, remember, mankind has yet ahead of it what the last book of the Holy Bible speaks of as the reign of Jesus Christ over earth for a thousand years, the millennial reign of Christ. … It would not be by mere chance or accident but would be according to the loving purpose of Jehovah God for the reign of Jesus Christ, the 'Lord of the Sabbath,' to run parallel with the seventh millennium of man's existence."
Kingdom Ministry March 1968
In view of the short period of time left, we want to do this [pioneer] as often as circumstances permit. Just think, brothers, there are only about ninety months left before 6,000 years of man's existence on earth is completed.
Watchtower 1968 August 15 Why Are You Looking Forward to 1975?
"What about all this talk concerning the year 1975? Lively discussions, some based on speculation, have burst into flame during recent months among serious students of the Bible. Their interest has been kindled by the belief that 1975 will mark the end of 6,000 years of human history since Adam's creation. The nearness of such an important date indeed fires the imagination and presents unlimited possibilities for discussion.
2 But wait! How do we know their calculations are correct? What basis is there for saying Adam was created nearly 5,993 years ago? Does the one Book that can be implicitly trusted for its truthful historical accuracy, namely, the Inspired Word of Jehovah, the Holy Bible, give support and credence to such a conclusion?
35 One thing is absolutely certain, Bible chronology reinforced with fulfilled Bible prophecy shows that six thousand years of man's existence will soon be up, yes, within this generation! (Matt. 24:34) This is, therefore, no time to be indifferent and complacent. This is not the time to be toying with the words of Jesus that "concerning that day and hour nobody knows, neither the angels of the heavens nor the Son, but only the Father." (Matt. 24:36) To the contrary, it is a time when one should be keenly aware that the end of this system of things is rapidly coming to its violent end. Make no mistake, it is sufficient that the Father himself knows both the "day and hour"!
36 Even if one cannot see beyond 1975, is this any reason to be less active? The apostles could not see even this far; they knew nothing about 1975. All they could see was a short time ahead in which to finish the work assigned to them."
Awake 1968 October 8 p.14
There is another way that helps confirm that we are living in the final few years of this "time of the end". The Bible shows that we are nearing the end of a full 6,000 years of human history.
Awake! 1969 May 22 p.15
"If you are a young person, you also need to face the fact that you will never grow old in this present system of things. Why not? Because all the evidence in fulfillment of Bible prophecy indicates that this corrupt system is due to end in a few years. Of the generation that observed the beginning of the "last days" in 1914, Jesus foretold: "This generation will by no means pass away until all these things occur."-Matt. 24:34. Therefore, as a young person, you will never fulfill any career that this system offers. If you are in highschool and thinking about a college education, it means at least four, perhaps even six or eight more years to graduate into a specialized career. But where will this system of things be by that time? It will be well on the way toward its finish, if not actually gone!"
Watchtower 1969 October 15
In order for the Lord Jesus Christ to be "Lord even on the sabath day", this thousand-year reign would have to be the seventh in a series of thousand-year periods or milleniums. Thus it would be a sabbatic reign.
Watchtower 1970 May 1
"Bible chronology which indicates that Adam was created in the fall of the year 4026 B.C.E. would bring us down to the year 1975 C.E. as the date marking 6,000 years of human history with yet 1,000 years to come for Christ's Kingdom rule. So whatever the date for the end of this system, it is clear that the time left is reduced, with only approximately six years left until the end of 6,000 years of human history."
Watchtower 1974 December 15
"And now, as the year 1975 opens up, some thousands of the anointed remnant, still alive on this earth, look ahead to realizing that joyful prospect. The increasing "great crowd" of their sheeplike companions look forward with them to entering the New Order without interruption of life. In the New Order Jehovah God will add to the "length of days" of the anointed remnant on earth to the point of satisfying the members thereof. It remains to be seen whether they will be yet retained here on earth to see the start of the resurrection of the earthly dead and to meet faithful witnesses of ancient, pre-Christian times. They would enjoy that, before being taken off the earthly scene to the heavenly reward with Christ."
Kingdom Ministry May 1974 p.3 How Are You Using Your Life?
"Yes, since the summer of 1973 there have been new peaks in pioneers every month. Now there are 20,394 regular and special pioneers in the United States, an all-time peak. That is 5,190 more than there were in February 1973! A 34-percent increase! Does that not warm our hearts? Reports are heard of brothers selling their homes and property and planning to finish out the rest of their days in this old system in the pioneer service. Certainly this is a fine way to spend the short time remaining before the wicked world's end."