The term 'Days in which Knights Flourished' refers to the medieval period, also known as the Middle Ages. This period was characterized by the rise of feudalism and the emergence of the knightly class. The answer to the crossword is 'YORE, ' which is an old-fashioned word for a long time ago or a distant past. Therefore, the phrase 'Days in which Knights Flourished' can be summarized as referring to the medieval period, which was a long time ago.