before 1975:
1968 "Just think, brothers, there are only about ninety months left before 6,000 years of mans existence on earth is completed... The majority of people living today will probably be alive when Armageddon breaks out, and there are no resurrection hopes for those who are destroyed then. So, now more than ever, it is vital not to ignore that spirit of wanting to do more." (Kingdom Ministry, March 1968, p. 4 [note: 1968 + 90 months = 1975])
1974 "Yes, the end of this system is so very near! Is that not reason to increase our activity?...Reports are heard of brothers selling their homes and propertyand 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." (Kingdom Ministry, May 1974, p. 3)
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After 1975:
1976: "It may be that some who have been serving God have planned their lives according to a mistaken view of just what was to happen on a certain date or in a certain year. They may have, for this reason, put off or neglected things that they otherwise would have cared for. But they have missed the point of the Bibles warnings concerning the end of this system of things, thinking that Bible chronology reveals the specific date." (Watchtower, July 15, 1976, p. 440)
note that prior to 1975 the advice from WTS was to not marry, not get an education, not pursue a career, and it was commending JWs who were selling property etc. in order to pioneer in "the short time remaining" before the end.
When 1975 failed, it now condemns those who "neglected things that they otherwise would have cared for" and who were focused on a "specific date".