Interestingly, in ancient times, there were three main Pagan seasonal harvest festivals and three main Jewish ones.
I suspect the distinction between the Pagan and Jewish celebrations was less in the middle ages than they are now. In local cultures, Christian customs did not become widespread until after the 9th century. Many Pagan customs (especially the winter solstice festivals) were morphed into Christian customs to promote conversion to Christianity. In some areas (e.g., Basque), Pagan customs survived much longer and are still practiced today.
So... these harvest festivals might be of interest, but there were usually three, not four, so there may not be a direct correspondence.
Something I noticed when studying clothing from the 14th and 15th centuries is that the wider and longer the sleeves and robes, usually the more important the person. More fabric was associated with people of wealth and status. It might provide some clues to the well-robed androgynous figure with the chalice and stingy things that resemble grain.
I suspect the distinction between the Pagan and Jewish celebrations was less in the middle ages than they are now. In local cultures, Christian customs did not become widespread until after the 9th century. Many Pagan customs (especially the winter solstice festivals) were morphed into Christian customs to promote conversion to Christianity. In some areas (e.g., Basque), Pagan customs survived much longer and are still practiced today.
So... these harvest festivals might be of interest, but there were usually three, not four, so there may not be a direct correspondence.
Something I noticed when studying clothing from the 14th and 15th centuries is that the wider and longer the sleeves and robes, usually the more important the person. More fabric was associated with people of wealth and status. It might provide some clues to the well-robed androgynous figure with the chalice and stingy things that resemble grain.