@James_woods, who asked
What I never understood was the strange JW teaching that the seven creative days were 7,000 years long each.
I believe the 7000 year day came as a result of reverse engineering. The Society figured mankind was 6000 years old as of 1975. If you add 1000 years for the Millineal reign of Christ you have a total of 7000 years, at which time mankind would be restored to perfection. They thought that sounded neat and complete, since 7000 is a Scripturally 'perfect' number.
But that failed. The last reference* to the 7000 year long Day was in 1987.
(W 1-1-87, p30)
Second, a study of the fulfillment of Bible prophecy and of our location in the stream of time strongly indicate that each of the creative days (Genesis, chapter 1) is 7,000 years long. It is understood that Christ’s reign of a thousand years will bring to a close God’s 7,000-year ‘rest day,’ the last ‘day’ of the creative week.
Since then the Society has been mum on the 7000 year Day.
(*Note to readers, if there is a reference to the 7000 year Day later than the 1-1-87 Watchtower I would like the quote to update my notes. Thanks!)