Home›Sources›The Oxford Companion to the Year: An Exploration of Calendar Customs and Time-ReckoningSourcesThe Oxford Companion to the Year: An Exploration of Calendar Customs and Time-ReckoningCitation FormatsGeneral ReferenceGeneral Reference Citation TextDivinity Atlas. "The Oxford Companion to the Year: An Exploration of Calendar Customs and Time-Reckoning." Accessed August 30, 2026. https://dev-divinity.interactiveatlas.org/sources/the-oxford-companion-to-the-year-an-exploration-of-calendar-customs-and-time-reckoning.Copy General ReferenceAPA StyleAPA Style Citation TextDivinity Atlas. (n.d.). The Oxford Companion to the Year: An Exploration of Calendar Customs and Time-Reckoning. Retrieved August 30, 2026, from https://dev-divinity.interactiveatlas.org/sources/the-oxford-companion-to-the-year-an-exploration-of-calendar-customs-and-time-reckoningCopy APA StyleBibTeXBibTeX Citation Text@misc{divinityatlas-the-oxford-companion-to-the-year-an-expl, author = {Divinity Atlas}, title = {The Oxford Companion to the Year: An Exploration of Calendar Customs and Time-Reckoning}, year = {2026}, url = {https://dev-divinity.interactiveatlas.org/sources/the-oxford-companion-to-the-year-an-exploration-of-calendar-customs-and-time-reckoning}, note = {Accessed August 30, 2026} }Copy BibTeXThis reference is built in two distinct parts for two distinct kinds of claim: a day by day guide to calendar customs grounded in documented folk practice, and a separate technical survey of more than eighteen historical calendar systems with the actual conversion tables a reader could use to check a date calculation directly. That the book separates documented custom from technical mechanism, rather than blending them into one narrative, is a real methodological strength. This record has not independently traced a documented history of corrections to specific entries. It is a strong source for how different calendar systems relate to one another and for the grouping level fact that a holy day fixed in one reckoning moves against the civil Gregorian year. A claim about the specific religious meaning or observance of a particular holy day needs a source dedicated to that tradition.FactsClaims Backed By This Source (317 claims)Comments (0)Reader Challenges (0 open reader challenges)FactsAssessmentReliability TierWell-attested1A reference built in two distinct parts, a day-by-day guide to documented calendar customs and a separate technical survey of more than eighteen historical calendar systems with the actual conversion tables a reader could use to check a date calculation directly.NotesWell-attestedPart I is a day-by-day guide to calendar customs; Part II ("Calendars and Chronology") sets out more than eighteen calendar systems with conversion tables. Cited here for the grouping-level fact that a holy day fixed in its own reckoning moves against the civil Gregorian year.CitationAuthorWell-attestedBonnie Blackburn and Leofranc Holford-StrevensPublisherWell-attestedOxford University PressPublication YearWell-attested1999URLWell-attestedhttps://archive.org/details/oxfordcompaniont00blacSource TypeWell-attestedreferenceClaims Backed By This Source (317 claims)This source backs 317 claims across the atlas. As facts: 136 well-attested, 3 scholarly debate. As cited relationships: 76 holds, 1 connected. Plus 101 entities citing it as a general reference with no single fact or relationship attached.Disposition By TopicHolidays & Festivals, 109 claims: 1 well-attested, 56 holds, 52 general references.Months of the Year, 67 claims: 42 well-attested, 1 scholarly debate, 12 holds, 12 general references.Articles, 64 claims: 50 well-attested, 5 holds, 1 connected, 8 general references.Calendars, 40 claims: 30 well-attested, 10 general references.Islamic Months, 12 claims: 12 general references.Sacred Foods, 8 claims: 3 well-attested, 2 holds, 3 general references.Sources, 8 claims: 8 well-attested.Deities, 5 claims: 1 well-attested, 2 scholarly debate, 1 holds, 1 general references.Beliefs & Restrictions, 2 claims: 2 general references.Categories, 2 claims: 1 well-attested, 1 general references.Well-attested136ArticlesA Numbering Invented to Fix the Date of EasterCaesar's Reform, and the Day It Slowly LosesEaster's Month and the Festivals of Mid AprilFour Dishes Whose Ingredients Are Chosen to Be Read Rather Than Only TastedHow a Movable Feast Finds Its Date Each YearHow the Full Moon Is ReckonedHow the Last Quarter Is ReckonedHow the New Moon Is ReckonedJanus at the Gate of the YearSextilis Becomes the Month of AugustusStill the Working Calendar of Several Living ChurchesThe First Month of the Old Roman YearThe Full Moon, the Disc EntireThe Month of PurificationThe New Moon, the Dark of the MonthThe Waxing Crescent, the Growing SliverThirteen Days Behind the SunThirteen Months, Five Hundred and Fifty Eight NamesThree Months From the Autumn Equinox to the Turn Toward AdventThree Months From the Spring Equinox to Beltane and VesakThree Months From the Summer Solstice to a Harvest Already TurningThree Months From the Winter Solstice to a Purification Before LentWhat a Month Entry CoversWhat the Neutral Name Does and Does Not ChangeCalendarsCommon EraJulian CalendarThe Positivist CalendarCategoriesHolidays & FestivalsDeitiesSol InvictusHolidays & FestivalsChristmastideMonths of the YearAprilAugustDecemberFebruaryJanuaryJulyJuneMarchMayNovemberOctoberSeptemberSacred FoodsSabzi PoloVasilopitaSourcesThe Oxford Companion to the Year: An Exploration of Calendar Customs and Time-ReckoningScholarly debate3DeitiesSol InvictusMonths of the YearAprilHolds76ArticlesFour Dishes Whose Ingredients Are Chosen to Be Read Rather Than Only TastedThree Months From the Autumn Equinox to the Turn Toward AdventThree Months From the Spring Equinox to Beltane and VesakThree Months From the Summer Solstice to a Harvest Already TurningThree Months From the Winter Solstice to a Purification Before LentDeitiesSol InvictusHolidays & FestivalsAll Hallows' EveAll SaintsAll Souls' DayAsalha PujaBeltaneCandlemasChristmasDeclaration of the BabDia de los MuertosDies Natalis Solis InvictiDormition of the TheotokosDziadyEasterEostreEpiphanyExaltation of the Holy CrossFeast of the AssumptionGuru PurnimaHanukkahHiganHinamatsuriImbolcInti RaymiLas PosadasLithaLughnasadhMabonMakar SankrantiMartyrdom of the BabMichaelmasNativity of the Blessed Virgin MaryNowruzObonOstaraOur Lady of FatimaOur Lady of GuadalupeOur Lady of LourdesReformation DaySamhainSaturnaliaShogatsu (New Year)SongkranTanabataThe AnnunciationShowing 1 to 50 of 71 entities carrying this claim. NextConnected1ArticlesThirteen Days Behind the SunGeneral References101ArticlesFour Dishes Whose Ingredients Are Chosen to Be Read Rather Than Only TastedHow a Movable Feast Finds Its Date Each YearThirteen Days Behind the SunThree Months From the Autumn Equinox to the Turn Toward AdventThree Months From the Spring Equinox to Beltane and VesakThree Months From the Summer Solstice to a Harvest Already TurningThree Months From the Winter Solstice to a Purification Before LentWhat a Month Entry CoversBeliefs & RestrictionsThe Julian Calendar for the Fixed FeastsThe Revised Julian Calendar for the Fixed FeastsCalendarsBabylonian CalendarChinese Luni-Solar CalendarCommon EraGregorian CalendarHebrew CalendarHindu PanchangaIslamic (Hijri) CalendarJulian CalendarMaya Calendar RoundThe Positivist CalendarCategoriesHolidays & FestivalsDeitiesSol InvictusHolidays & FestivalsAll Hallows' EveAll SaintsAll Souls' DayAsalha PujaBeltaneCandlemasChristmasChristmastideDeclaration of the BabDia de los MuertosDies Natalis Solis InvictiDormition of the TheotokosDziadyEasterEostreEpiphanyExaltation of the Holy CrossFeast of the AssumptionGuru PurnimaHanukkahHiganHinamatsuriImbolcInti RaymiLas PosadasLithaLughnasadhMabonShowing 1 to 50 of 101 entities carrying this claim. 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