This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "pub

An invaluable resource for working programmers, as well as a fount of useful algorithmic tools for computer scientists, astronomers, and other calendar enthusia

During the later Middle Ages (twelfth to fifteenth centuries), the study of chronology, astronomy, and scriptural exegesis among Christian scholars gave rise to