Here's my understanding of the Watchtower's teachings through the years -
1. First they taught that the Universe and the Earth were created 6,000 years ago in a single week.
2. Then they taught that the Universe was created at some unspecified point in the past, and that each of the six creative "days" was 6,000 years long.
3. Now they teach that the Universe was created at some unspecified point in the past, and that each of the six creative "days" was millions of years long.
So here are my questions: I know that point #2 (above) is promoted in the Paradise Lost book, and I know that point #3 (above) is promoted in the Life-How Did it Get Here-By Evolution or By Creation book. But when did they shift from teaching #2 to teaching #3? And did they, really, ever teach #1? If so, when did they switch to #2?
Any help would be greatly appreciated (I don't have many old pubs to check this myself).