Download or read book Demystifying the Gregorian Calender: A Look Into Its History and the Math Behind It written by Walter a. Calhoon and published by . This book was released on 2014-05-05 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout history, humankind has attempted to track time and keep records of its relentless progression. The calendar the world uses today is the Gregorian calendar. Packed with information about the origins of this calendar, its precursors and competitors, as well as its mathematical treatment and accuracy, Demystifying Our Gregorian Calendar gives you the tools, based on sound algorithms, to make a variety of calendar calculations. Walter A. Calhoon earned his Bachelor of Science degree in Mechanical Engineering from Bradley University, and his Master's degree in Mechanical Engineering from the University of Arizona. He then worked in the aerospace industry for 40 years, developing cutting-edge technology for the Department of Defense and NASA. Walter resides in southern California with his wife of 46 years, and has three children.