Hi Mark ...

You posted ...

"Step 9

Propose a model based on the Egyptian calendar:

Remember that there are 309 lunar months in 25 calendar years of 365 days in the Carlsberg Papyrus (now at Manchester).

Remember that an Egyptian calendar year of 365 days is equal to 36 weeks of 10 days plus a half week of 5 days

It is then self-evident that the perimeter of the base of the Red Pyramid may represent 8 cycles of 4 calendar years of 365 days"

May I ask from where you got this information , I went online to verify it and found much to my shock that The Carlsberg Papyrus ... is an ancient Egyptian medical papyrus. I am curious where 309 to 25 years would have come from. [en.wikipedia.org]

Perhaps it is from this one:

Fig. 4. Papyrus Carlsberg 1 is inscribed with a fundamental treatise on the celestial bodies known as the Book of Nut, second century AD. The Tebtunis temple library held several versions of the text, which is first attested nearly 1,500 years earlier in the reign of Sety I where it was engraved in stone in the underground temple of Osiris at Abydos. A master version from the library was written in hieroglyphs and included detailed illustrations, while other simpler versions contained only the text and were written in the hieratic script. The version here shown contains both the original text in the hieratic script and later commentary on the ancient composition written in demotic. Acquired 1931 by the Carlsberg Foundation. Image courtesy of the Papyrus Carlsberg Collection.

Apparently it is major collection ... still I would like to know where the quote came from. [www.carlsbergfondet.dk]

Well it seems this may be the source ...

[www.uni-koeln.de]

Regards
Don

"There is nothing as impenetrable as a closed mind"
and ..." if everything is a coincidence what is the point of studying or measuring or analyzing anything ?" db