Home›Sources›Calendrical Calculations: The Ultimate EditionSourcesCalendrical Calculations: The Ultimate EditionCitation FormatsGeneral ReferenceGeneral Reference Citation TextDivinity Atlas. "Calendrical Calculations: The Ultimate Edition." Accessed August 30, 2026. https://www.divinityatlas.com/sources/calendrical-calculations-the-ultimate-edition.Copy General ReferenceAPA StyleAPA Style Citation TextDivinity Atlas. (n.d.). Calendrical Calculations: The Ultimate Edition. Retrieved August 30, 2026, from https://www.divinityatlas.com/sources/calendrical-calculations-the-ultimate-editionCopy APA StyleBibTeXBibTeX Citation Text@misc{divinityatlas-calendrical-calculations-the-ultimate-ed, author = {Divinity Atlas}, title = {Calendrical Calculations: The Ultimate Edition}, year = {2026}, url = {https://www.divinityatlas.com/sources/calendrical-calculations-the-ultimate-edition}, note = {Accessed August 30, 2026} }Copy BibTeXThis is a technical scholarly reference giving the actual algorithms and rules for converting dates among the world's calendar systems, including Gregorian, Hebrew, Islamic, Hindu, Chinese, Baha'i and other religious and civil calendars, and its standing rests on those algorithms being checkable and reproducible rather than on any claim about calendars' religious meaning. Use it for calendrical conversion and the technical mechanics of how a specific calendar system actually works; it is explicitly not a source on the religious meaning of a date or festival, a distinction the book itself maintains, so a claim about why a date matters religiously needs a source addressing that tradition's own account of the observance.FactsClaims Backed By This Source (162 claims)Comments (0)Reader Challenges (0 open reader challenges)FactsAssessmentReliability TierWell-attested1A technical scholarly reference giving the algorithms for converting dates among the world's calendar systems including Gregorian, Hebrew, Islamic, Hindu, Chinese and Baha'i, published by Cambridge University Press; a source on calendrical mechanics, not on the religious meaning of a date or festival.NotesWell-attestedTechnical scholarly reference giving the algorithms and rules for converting dates among the world's calendar systems, including Gregorian, Hebrew, Islamic, Hindu, Chinese, Baha'i and other religious and civil calendars. Use for calendrical conversion and the mechanics of how a calendar system works; not a source on the religious meaning of a date or festival.CitationAuthorWell-attestedEdward M. Reingold and Nachum DershowitzPublisherWell-attestedCambridge University PressPublication YearWell-attested2018Source TypeWell-attestedacademic monographClaims Backed By This Source (162 claims)This source backs 162 claims across the atlas. As facts: 117 well-attested. As cited relationships: 16 holds. Plus 29 entities citing it as a general reference with no single fact or relationship attached.Disposition By TopicCalendars, 80 claims: 54 well-attested, 11 holds, 15 general references.Articles, 50 claims: 40 well-attested, 5 holds, 5 general references.Categories, 19 claims: 15 well-attested, 4 general references.Sources, 7 claims: 7 well-attested.Moon Phases, 3 claims: 3 general references.Sections, 2 claims: 1 well-attested, 1 general references.Holidays & Festivals, 1 claims: 1 general references.Well-attested117ArticlesA Church's Calendar, Still Kept TodayA moving lunar yearEvery Temple's Own Two Hundred Tenth DayFive Ways of Counting Time Rather Than Cycling ItFour Cycles That Never Touch the Seven Day WeekFrom Temple Records to the ZodiacMonths Named for FestivalsOne Calendar, Church and State TogetherRetired by Decree, Kept by CustomSeason and festivalSeven or Eight Years Behind, and WhySix Chinese Systems, Then One Japanese OneSolar, Lunar and LunisolarTen Calendars Solving the Same Problem the Same WayTen Weeks Running at OnceTwelve Calendars Built to Answer to the SunTwelve Months, a Little Month, and an Era of MartyrsTwo Calendars That Track the Moon Alone, and Nothing ElseCalendarsBabylonian CalendarBalinese PawukonChinese Luni-Solar CalendarCoptic CalendarEthiopian CalendarGregorian CalendarHebrew CalendarIslamic (Hijri) CalendarJapanese Traditional Calendar (Kyureki)Saka CalendarZoroastrian CalendarCategoriesCalendarsHebrew MonthsIslamic MonthsMoon PhasesSectionsCalendars & TimeSourcesCalendrical Calculations: The Ultimate EditionHolds16ArticlesFive Ways of Counting Time Rather Than Cycling ItFour Cycles That Never Touch the Seven Day WeekTen Calendars Solving the Same Problem the Same WayTwelve Calendars Built to Answer to the SunTwo Calendars That Track the Moon Alone, and Nothing ElseCalendarsAztec TonalpohualliChinese Luni-Solar CalendarCoptic CalendarEthiopian CalendarGregorian CalendarHebrew CalendarHindu PanchangaIslamic (Hijri) CalendarMaya Calendar RoundMaya Long CountGeneral References29ArticlesFive Ways of Counting Time Rather Than Cycling ItFour Cycles That Never Touch the Seven Day WeekTen Calendars Solving the Same Problem the Same WayTwelve Calendars Built to Answer to the SunTwo Calendars That Track the Moon Alone, and Nothing ElseCalendarsAztec TonalpohualliBabylonian CalendarBalinese PawukonChinese Luni-Solar CalendarCoptic CalendarEthiopian CalendarGregorian CalendarHebrew CalendarHindu PanchangaIslamic (Hijri) CalendarJapanese Traditional Calendar (Kyureki)Maya Calendar RoundMaya Long CountSaka CalendarZoroastrian CalendarCategoriesCalendarsHebrew MonthsIslamic MonthsMoon PhasesHolidays & FestivalsMakar SankrantiMoon PhasesFull MoonNew MoonWaxing CrescentSectionsCalendars & TimeComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year