The Voynich Manuscript:
There is virtually nothing known about this manuscript. It is estimated that it was created in the 15th century, possibly in Italy. It has been studied by professional cryptographers, including American and British codebreakers from both World War I and World War II to no avail. The fact that nobody has been able to decipher this book has titillated people all over the world since it was discovered in 1912.
or they are respectful that not all religions utilize the same calendar...
"When in Rome..."
...I use my own d@$% calendar, and I expect everyone else to accommodate me!!!!!
Darwin has nothing to do with historical timelines.
https://en.wikipedia.org/wiki/Sacsayhuam%C3%A1n
What we're talking about is the Norse settlements leading to the settling of the North American continent. Greenland because of it's proximity to N. America is the reason it's included.