Note 704 — BOOK XXXIII. THE NATURAL HISTORY OF METALS.647
John Bostock translation
“Dies fasti.” These were the days on which the courts sat, and the Prætor, who was the chief judge, gave his decisions. The word “fasti” is derived from the ancient Latin “for,” or from the old Greek word φάω, both signifying “to speak:” consequently the “dies fasti” were “the speaking days,” and the “dies nefasti” the “non-speaking days,” in allusion to the restrictions put upon the judgments of the Prætor.