Thanks to Arthur for sending me a link to this interesting blog:
It suggests that apparent irregularities in the re-appearance of Halley’s comet (which returns every 76 years, according to what mainstream astronomy tells us) might more easily be explained by the conclusion that the earth changed from a 355 – 365 day year at a certain point. This blog also contains the suggestion / statement that the Greenland Ice Sheet formed as recently as 945 AD….