The part for the month of May shows a horseman in full equipment. He is wearing a ring mail, which reaches below his knees, a helmet with a nosepiece and he is carrying a lance and a kite shaped shield with no umbo. He sits astride his stallion in a grand saddle. His right foot, which is placed in a stirrup, carries a spur.
In some calendars you will find a horseman portrayed. Sometimes he holds a twig or a flower, most often a gerfalcon. Sometimes he is in the saddle, other times he leads the horse by its bridle. He can also be found portrayed without his horse but with the gerfalcon resting on his hand or sometimes as a man resting in the shade of a tree. Only in one other case aside from on the Baldishol Tapestry is he armed - on a stained-glass painting in the cathedral in Chartres he carries a lance.
In an older Danish peasant's handbook from 1680 it is written about the month of May:
The Motive of the Month of April
The Edging, Flowers and other Details
The History of the Baldishol Tapestry
The Weaving technique of the Baldishol Tapestry