Sowing by the phase of the moon

My neighbour is a great one for not pruning, especially vines (and he comes from a vineyard background) when the moon is full, or when there is the biggest pull on the sap.
I'm not so sure and suspect it is derived from the earliest phases of prehistoric farming and agriculture when some kind of calendar and order was needed, exactly as Eyren says.

You could be right with that PP, yet Veggie hasn't mastered it, even yet