I knew about the eleven days as a kid, and wondered about this, Terry , you have got a brain the size of a planet, did the WT take the eleven days into account ?
You mean size of a peanut, don't you? :)
Here is my opinion on the Watchtower Chronology (and all other religious attempts at chronology):
Utter and complete folderol!
If you simply keep in mind that we base everything EVERYTHING on the Bible you can see the problem.
1. The entire Bible is a cut-and-paste series of layers, revisions, accretions, more layers, editorial revisions, layers...etc.
2. Since so many hands were at work crafting the Bible there is no foundation or baseline METHOD to timekeeping nor internal heuristic.
3.Internal inconsistencies stymie even the most liberal computations and attempts at reconciliation.
Add to all the above one strange fact:
Neither Hebrew nor Greek had a set of numbers at all!
There were no number symbols for giving years, distances, amounts, measurements, etc.
Think about that!
In Hebrew as in Greek the letters of the Alphabet did DOUBLE DUTY as numbers!
Yes, that is crazy and it led to a very superstitious view of co-incidence when a number combination simultaneously spelled out a word!
This is called GEMATRIA.
The best-known example of Gematria is the Hebrew word Chai ("life"), which is composed of two letters which add up to 18. This has made 18 a "lucky number" among Jews, and gifts in multiples of $18 are very common among Jews.