Leap's Day is a story about the calendar, friendship and the things that make us special. Join Leap as he sets out to find a special day - a "birthday" - for each one of his friends, only to discover that he must first create a calendar. Leap works with his dad to unravel the mystery of years, months, days and dates - and of course that pesky little day that comes along just once every four years.

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.

In this book, Latanya Collins invites all readers to a Spiritual Platform where God is the Master of Service. Topics are addressed in detail and according to biblical principles. The define of Time and the question: “What is a Leap Year?” are well expounded upon. Some facts supposedly proven, others debated to present are highlighted for study. Noting many obvious contradictions about the previous mentioned, as well as, other relevant topics to walking with God, this book inspires a way for anyone to embrace their ability to begin a “Life-long Journey Experience” of daily cleansing, consecration, refreshing, reproofing and restoration. Although all entailed in this book is seemingly addressed solely to Christian Believers seeking the “Straight and Narrow Path”, it is highly recommended that people of different religious beliefs explore the writings in between these pages to possibly learn where they are in their ‘Spiritual Journey’ unto an eternity of “DUE SEASON”. Humbly Serving In Due Season, Prophetic Apostolic Outreach Ministries True Worshippers of the Harvest - Matthew 9:37, 38

Since the turn of the 20th century, new calendars have been introduced to replace the existing calendar. Some bring the year length closer to the tropical year. Others link the weekdays to monthly dates so that year after year, our birthdays fall on the same date of the month and the same day of the week. This book is a comprehensive guide to various calendar systems, including those designed to replace the current Gregorian Calendar. It introduces a new calendar that aligns weekdays with monthly dates, offering significant advantages over the Gregorian Calendar. Its system is remarkably accurate when compared to the tropical year length, with only 4 - 5 leap years in a century, reducing confusion. It also offers 42 additional days off per year without compromising earnings. It discusses several topics yet also leaves some open for further discussion. The main objective is to unite the entire world on the subject of calendars, not to shortchange anyone.

In remote prehistory, before anything and everything else that would come to pass, in a portion of the Bible that most people skip over, we have written treasure that extends into the distant past.

Expanded coverage includes generic cyclical calendars, astronomical lunar calendars, and the Korean, Vietnamese, Aztec, and Tibetan calendars.

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.

Second Edition 2024 This book explains why the UK tax year begins on 6 April and traces the history of the old tax year which ran from 25 March. It also covers other aspects of calendar history and related issues, including the continuing application of the 1750 British calendar reform statute to the USA and elsewhere. The move from the Julian to the Gregorian calendar in 1752 resulted in the omission of 11 days from September 1752. The omitted days were later added to the tax year and that apparently meant a new tax year beginning on 5 April - not 6 April. There are various explanations for the addition of a further day so the year began on 6 April, including the suggestion that a day was added in 1800. In fact the old tax year ran “from” 25 March and an ancient legal rule said “from” meant the year began on the following day, 26 March. Hence adding 11 days to 26 March produced a new tax year beginning on 6 April. It is often said that the Treasury extended the tax year by 11 days to avoid losing money. This is untrue. The Second Edition revises and expands particularly the key explanation on the way the tax year changed.