The Mathematics of the Calendar


Book Description

This book will explain the mathematical details behind the Jewish calendar and Easter calculation with a mathematical proposal to fix the Jewish Calendar from an actuary.In addition, we will explore the mathematics behind the Mayan calendar, Islamic calendar, and our everyday calendar, the Gregorian calendar. First, I will demonstrate how the Jewish calendar works, and how to convert dates between the Jewish calendar to the Gregorian/Julian calendar. I will then explain the Easter calculation and demonstrate how to use the methods from the Easter calculation to fix the Jewish calendar so that the Jewish calendar stays consistent with the solar cycle. In 1582, there were two competing proposals to reform the Julian calendar. I will explain the mathematics behind the two proposals. I will explain the proposal that placed Washington, DC on the 77th meridian.




Mathematics 2022: Your Daily Epsilon of Math


Book Description

Keep your mind sharp all year long with Mathematics 2022: Your Daily Epsilon of Math, a 12" × 12" wall calendar featuring 12 images relating to math concepts! Let mathematicians Rebecca Rapoport and Dean Chung tickle the left side of your brain by providing you with a math challenge for every day of the year. The solution is always the date, but the fun lies in figuring how to arrive at the answer, and possibly discovering more than one method of arriving there. Some of the most tricky problems require only middle school math applied cleverly. With entry-level algebra, word problems, math puns, and interesting math definitions added into the mix, this calendar will intrigue you for the whole year. End the year with more brains than you had when it began with Mathematics 2022: Your Daily Epsilon of Math.




Judaism, Mathematics, and the Hebrew Calendar


Book Description

The author explores several connections between mathematics and the history and tradition of Judaism, including the use of gematria to discover deeper meanings of words and phrases in the Torah. this book analysis the mathematical structure and properties of the Hebrew calendar, including probabilities assoiated with the calendar and computation of correspondences between Hebrew and civil dates. Intended for the scholar and layperson alike, this volume will appeal to reders with an interest in Judaism and/or mathematics.




The Mathematics of the Gregorian Calendar


Book Description

Most of this book is based on codes assigned to each month of the year, to each year and to each century. Since Pope Gregory XIII replaced the Julian calendar with the Gregorian calendar on February 24, 1582, (and I don't know if he named after himself), the calendar has followed a cycle that makes it predictable. That's where you and I come in. The mathematics is based on an easily learned system called Modulo 7. The problems involve dates and are based an equation with involving 4 quantities. One of them will be unknown. In Task A, that will be the day of the week. If a carnival had a wheel with a spinner that had the 7 days of the week on them, wherever the spinner stops MUST be a day of the week. That is essentially modulo 7. There are no fractions. There are just seven numbers. Readers should know multiples of 7 to avoid having to look at the table.




Let's Play Math


Book Description




The Mayan and Other Ancient Calendars


Book Description

The only small, popular book on the important subject of ancient calendars. The study of heavenly cycles is common to most ancient cultures. The ancient Egyptians, Chinese, and Babylonians all tried to make sense of the year. But it fell to the later Mesoamerican Maya to create a series of calendars that could be cross referenced. In doing so, the Maya discovered many strange numerical harmonics. Their lunar calendar was extremely accurate-far more so than the Greek Metonic cycle; they tracked Venus to an accuracy of less than a day in five hundred years and their tables could have been used to predict eclipses seven hundred years in the future. This book will provide a much needed compact guide to the Mayan calendar systems as well as covering the essentials of calendar development throughout the world.







Mathematics 2022: Your Daily Epsilon of Math


Book Description

Keep your mind sharp all year long with Mathematics 2022: Your Daily Epsilon of Math, a 12" × 12" wall calendar featuring 12 images relating to math concepts! Let mathematicians Rebecca Rapoport and Dean Chung tickle the left side of your brain by providing you with a math challenge for every day of the year. The solution is always the date, but the fun lies in figuring how to arrive at the answer, and possibly discovering more than one method of arriving there. Some of the most tricky problems require only middle school math applied cleverly. With entry-level algebra, word problems, math puns, and interesting math definitions added into the mix, this calendar will intrigue you for the whole year. End the year with more brains than you had when it began with Mathematics 2022: Your Daily Epsilon of Math.




The Perfect Time


Book Description

In 1995, Mark Silen was playing around with simple math and working with calendars when he stumbled upon something so amazing that he began to question nearly everything he had ever been taught. In The Perfect Time: The Universal Calendar, Silen shares the results of his research into one of the biggest coincidences in historythat man could have potentially missed the perfect measurement of time by one day. Never in a million years did Silen think that seven numberstwo easy addition equations and six simple multiplication equationswould apply to so many disciplines, but as he began to create his Universal Calendar, he realized that many issues in religion, mathematics, science, and history could have been forever affected by the use of these seven, perfect numbers. As Silen shares an easy-to-understand system based on common knowledge and logic, he questions why we are still using a calendar system today that was created by people who thought the earth was flat. The fascinating system behind The Perfect Time: The Universal Calendar illustrates all the reasons why a new, more simplistic calendar could have a major impact on todays society and have more meaning than any other calendar in history.




Calendrical Calculations


Book Description

An invaluable resource for working programmers, as well as a fount of useful algorithmic tools for computer scientists, astronomers, and other calendar enthusiasts, The Ultimate Edition updates and expands the previous edition to achieve more accurate results and present new calendar variants. The book now includes coverage of Unix dates, Italian time, the Akan, Icelandic, Saudi Arabian Umm al-Qura, and Babylonian calendars. There are also expanded treatments of the observational Islamic and Hebrew calendars and brief discussions of the Samaritan and Nepalese calendars. Several of the astronomical functions have been rewritten to produce more accurate results and to include calculations of moonrise and moonset. The authors frame the calendars of the world in a completely algorithmic form, allowing easy conversion among these calendars and the determination of secular and religious holidays. LISP code for all the algorithms is available in machine-readable form.