Hi Titus,
I have looked to see if I can get some clarity on the issue. Unfortunately the bible does not give Eve much press. With reference to the birth of Seth Genesis 5v3 it states that Adam lived on for 130 years before fathering Seth and after Seth he lived for 800years. It doesn't offer any specifics as to how old Eve was when these events occurred.
It may be that these dates are recorded elsewhere or there has been something published in a magazine that speculates on this.
In recent articles the watchtower has stopped referring to the creative days as being 1000 yrs per day and use the expression serveral thousand years instead. This can mean an indeterminate length of time so how long has to pass from the creation of Adam until the end of the day of rest is uncertain.
Although there seems to be alot of rhetoric about loyalty and the end of the system being around the corner there is no mention of a date this time round.
As others have suggested there has been some effort to distance the society from 1975 and other dates. There is no doubt that in the past those dates were given prominence I remember it.
Welcome I look forward to seeing what others have found.