method
Every source, listed
Every Western personality claim carries a count of how many of twelve fixed voices support it. These are the twelve. Seven classical and early-modern works read in full, five contemporary publishers read across all twelve signs — the same panel on every sign, which is what makes the number comparable.
71 voices in total · 153 claims with three or more · 51 recorded disagreements
The Today provider audit
Current calendar and sky facts are computed from the reviewed local modules. Publisher prose is a separate, optional Western-only layer: the adapter remains off until server credentials and account terms are approved.
- Prokerala Astrology API v2 OpenAPI specificationselected optional adapter contract
GET /v2/horoscope/daily with datetime and sign; OAuth 2 client credentials; basic response schema and 250-credit operation badge.
- Prokerala pricing, credits and termsquota, cache, attribution and commercial-use control
Free-plan quota/rate limit; current credit table; maximum 24-hour cache age; clickable attribution on the free plan; no standalone redistribution.
- AstrologyAPI Sun Sign Daily Predictionevaluated alternative
POST sun_sign_prediction/daily/:zodiacName and horoscope-suite pricing; Western/Indian coverage does not establish all-tradition parity.
Quarantined from Today
One daily API for every tradition: No audited provider supplies equivalent licensed prose for all implemented systems. Unsupported systems receive computed facts or an explicit held state, never renamed Western copy.
Sending the raw birthday to a publisher: The selected endpoint needs only a derived Western sign and forecast day, so Bodhastra does not disclose the raw birth date.
The Bengali Panjika foundation
Government-hosted calendar-reform evidence controls the Bangladesh civil conversion. Banglapedia and the University of North Bengal establish the regional Panjika and Jyotisha context; the Positional Astronomy Centre controls the scientific Panchang layer.
- Bangladesh Teachers Portal, revised Bangla calendarGovernment-hosted civil-calendar control
2019 revision: first six months 31 days; Falgun 29 or 30 in a Gregorian leap year; Pohela Boishakh remains 14 April
- Banglapedia, PanjikaBengali almanac history and scope
Panjika's calendrical parts, planetary positions, Moon-in-rashi notation, horoscope material, printing history and reforms
- Positional Astronomy Centre, Rashtriya PanchangScientific Panchang control
Bengali edition and modern computation of tithi, nakshatra and nirayana planetary positions
- Positional Astronomy Centre, Daily Astronomical InformationIndependent tithi, nakshatra and Moon-rashi fixture
6 September 2026: Krishna Dashami until 19:30 IST, Ardra until 19:53 IST and Moon in Mithuna; therefore all three hold at the calculator's 06:00 UTC snapshot
- University of North Bengal, learning in medieval BengalRegional Jyotisha history
Jyotisha study in Bengali tols, Panjika forecasts, zodiac/planetary calculations and horoscope drawing
Quarantined, not forgotten
One unnamed Bengali calendar: Bangladesh's fixed 2019 national calendar and West Bengal's traditional solar calculations are not interchangeable.
Projecting the 2019 reform backward: The converter begins with the reform instead of relabelling older historical dates.
A separate Bengali personality zodiac: The reviewed sources support a regional Panjika/Jyotisha layer, not another twelve-symbol natal genre.
Calling a noon tithi the whole day's tithi: Tithi and nakshatra can change during a civil day; this phase labels one Dhaka-noon snapshot.
The Aztec calendar-structure foundation
The Digital Florentine Codex controls the twenty Nahuatl day signs and a primary festival witness. INAH and UNAM sources control the Mexica ritual-year sequence, 52-year material culture, terminology disputes and contradictory colonial correlations. Oxford supplies the modular arithmetic; PNAS keeps seasonal adjustment in view.
- Digital Florentine Codex, Book 4, folio 82rPrimary day-sign witness
Getty’s searchable edition identifies the twenty tonalpohualli signs in Nahuatl, English and Spanish on one manuscript folio
- Digital Florentine Codex, Book 2: The CeremoniesPrimary festival-cycle witness
The bilingual manuscript and Indigenous images document the annual sequence of veintena ceremonies without turning those periods into European lunar months
- Bartl, Göbel and Prem, Los calendarios aztecas de SahagúnSequence and correlation control
Estudios de Cultura Náhuatl 19 (1989), pp. 13–82: eighteen twenty-day periods, five nemontemi, variant names, contradictory colonial correlations and unresolved first-period order
- Gabriel K. Kruell, Algunas precisiones terminológicas sobre el calendario náhuatlPhilological terminology control
Estudios de Cultura Náhuatl 54 (2017), pp. 135–164: distinguishes tonalpohualli, cempohuallapohualli and xiuhtlapohualli and challenges familiar modern labels
- Rafael Tena, La religión mexicaMexica ritual-year control
INAH’s open 2012 edition lists the eighteen veintenas and their festivals in the official Mexica ritual cycle
- Anthony F. Aveni, The Measure, Meaning, and Transformation of Aztec Time and CalendarsCycle arithmetic control
Oxford Handbook of the Aztecs (2016), pp. 107–116: 13 × 20, 18 × 20 + 5 and the 18,980-day conjunction connected with New Fire
- INAH, Sepulcro de los años, xiuhmolpilli y la ceremonia del Fuego NuevoObject and ceremony control
A Centro INAH Estado de México account connects a surviving year-bundle representation with the 52-year renewal ceremony
- Ezcurra, Ezcurra and Meissner, Ancient inhabitants of the Basin of Mexico kept an accurate agricultural calendarSeasonal-adjustment control
PNAS 119.51 (2022), e2215615119: horizon and Mount Tlaloc observations could keep the agricultural calendar aligned to the solar year
- Thomas L. Grigsby, A Correlation of Gregorian and Tonalpohualli Dates on the Aztec Calendar StoneModern correlation case study
Estudios de Cultura Náhuatl 66 (2023), pp. 47–78: a recent Caso–Nicholson-based proposal whose model-specific results demonstrate why every converter must name its correlation
Quarantined, not forgotten
A Gregorian birthday converter with no named correlation: Rejected because colonial anchors and modern reconstructions disagree about the year start, veintena alignment and intercalation; a date result would hide model choices as fact.
One uninterrupted 365-day count or leap rule presented as settled: Held because the sources disagree while recent archaeoastronomy supports observational adjustment to the seasonal year.
Tonalpohualli renamed with Maya Tzolk’in signs: Rejected because related 13-by-20 structures do not erase distinct Nahuatl names, histories, uses or correlation problems.
Day-sign personality profiles: Held until claims can be attributed to a specific Nahua witness or living community instead of generic zodiac copy.
Aztec compatibility scores: Held because the structural sources establish counts and ritual contexts, not a modern pair-matching algorithm.
One uniform calendar for every Nahua community and century: Rejected because the foundation is explicitly Mexica/Sahagún-centred and the source record preserves regional, chronological and terminological variation.
A fused Mesoamerican zodiac: Held outside this phase; structural resemblance is evidence of a broader Mesoamerican calendar family, not permission to merge named traditions.
The Fusion comparison method
These sources control how relationships may be classified and how provenance stays attached. They do not replace the tradition-specific sources below, and they do not turn resemblance into shared meaning.
- W3C, SKOS Simple Knowledge Organization System ReferenceCross-scheme mapping vocabulary
Section 10 distinguishes exact, close, hierarchical and associative mappings and says mapping properties do not replace provenance management
- W3C, PROV Data ModelProvenance architecture
The model separates source entities, generating activities, responsible agents and derivations so a result can retain how it was produced
- Ralph Weber, How to Compare? On the Methodological State of Comparative PhilosophyComparison-method control
Philosophy Compass 8.7 (2013), pp. 593-603: comparison needs an explicit method rather than an assumption that cultural difference supplies one
- Global Indigenous Data Alliance, CARE Principles for Indigenous Data GovernanceIndigenous-data ethics control
Collective Benefit, Authority to Control, Responsibility and Ethics keep Indigenous knowledge connected to people, purpose and governance
Quarantined from Fusion
Similar animals, elements, signs or cycles translated into one identity: Rejected because resemblance or historical relationship does not make concepts interchangeable across named traditions.
A universal personality, compatibility, agreement or truth score: Rejected because the approved traditions do not share one sourced semantic scale, and structural correspondences cannot create one.
One combined label with date, place, convention or uncertainty removed: Rejected because those fields are part of the calculation result, not implementation details.
Raw birth date, time, time zone or place in a server-saved or shared Fusion payload: Rejected at the server/share boundary. The date may stay device-local for calculator prefilling; only derived labels and provenance may leave that browser.
A result from a held or structurally incomplete calculator: Rejected because Fusion can compare only calculations already approved and source-visible in their own tradition.
An analogy inherited through a third tradition: Rejected because every pair needs its own evidence decision; A resembling B and B resembling C does not establish a reviewed A-to-C relation.
Saved, shared or indexed result-combination pages: Rejected because the approved public surface is one explanatory POST calculator; birth inputs and result combinations do not become URLs.
A synthesis row without its own pair decision: Rejected because the public renderer is an allowlist: incommensurable and unreviewed pairs remain absent until separately researched and approved.
The Maya calendar-math foundation
Smithsonian material with living Maya contributors controls the calendar structure, terminology and modern fixtures. U.S. Naval Observatory formulas control the Julian-day bridge. A correlation paper keeps GMT 584283 visibly disputable, while a museum monument supplies an independent historical fixture.
- Smithsonian NMAI, Living Maya Time: The Calendar SystemStructure and living-practice control
Long Count units; 260-day Tzolk’in/Chol Q’ij; eighteen Haab’ months plus Wayeb’; Calendar Round; living Maya day keepers
- Smithsonian NMAI, Maya Calendar ConverterPublic conversion and fixture control
1 January 2000 and 20–21 December 2012 Long Count, Tzolk’in and Haab’ examples; day-name and month-name sequence
- Smithsonian NMAI, The Maya Calendar SystemLong Count unit control
20 k’in per uinal, 18 uinal per tun, 20 tun per katun and 20 katun per baktun
- Marc Zender and Joel Skidmore, Exploring the 584286 CorrelationCorrelation dispute and day-boundary control
History of GMT 584283, competing values, Julian Day arithmetic and sunrise/sunset complications in inscription dates
- U.S. Naval Observatory, Julian Date Converter and formulasJulian-day control
Julian Date as a continuous count from noon, the 0.5 midnight fraction, Gregorian/Julian leap rules and published conversion formulas
- The Metropolitan Museum of Art, Set in StoneIndependent inscription fixture
Piedras Negras Stela 5 pairs 2 November 716 with 9.14.5.0.0 12 Ajaw 8 K’ank’in; under the pre-1582 Julian convention documented by USNO, both resolve to one JDN
- Foundation for the Law of Time, HistoryDreamspell authorship and date control
The organization dates the thirteen-month calendar design to 1990 and Dreamspell codes to 1991
- 13moon.com, Dreamspell: Door to the InfiniteModern-system self-description
Promoters explicitly describe Dreamspell as a modern universal application and not the traditional Maya calendar
Quarantined, not forgotten
GMT 584283 presented as certain: Rejected because nearby GMT-family values and other correlations remain part of the scholarly dispute.
Midnight presented as a universal Maya day boundary: Rejected because inscription and living-calendar sources discuss changes at sunrise or sunset; the converter labels its civil-date convention.
Dreamspell or a Galactic Signature called Tzolk’in: Rejected because Dreamspell’s own organizations date and describe it as a modern universal system rather than the traditional Maya count.
Unsourced day-sign personality profiles: Held until Maya-authored or community-specific sources can support interpretation without flattening living ceremonial practice.
Tonalpohualli treated as interchangeable with Tzolk’in: Rejected because shared 13-by-20 arithmetic does not make Maya and Mexica names, histories or meanings the same.
A 2012 apocalypse prediction: Rejected because 13.0.0.0.0 is a period completion, not evidence that the Maya predicted the end of the world.
The “Native American zodiac” evidence note
Catalogue records and the authors’ own framing date Earth Astrology as an authored 1980 system. Museum and Native-led guidance control the category boundary: Native nations are distinct, living peoples, not one culture. A peer-reviewed reception study supplies critical context without being used to infer any nation’s teaching.
- WorldCat, The Medicine Wheel: Earth AstrologyPublication and authorship control
Sun Bear and Wabun Wind as authors, 1980 copyright, and the catalogue description of a whole new earth-astrology system
- Google Books, The Medicine Wheel: Earth AstrologyEdition control
Simon & Schuster, 22 April 1980, 224 pages, ISBN 9780671764203
- Publisher-supplied excerpt, The Medicine Wheel: Earth AstrologyAuthored-scope control
The authors describe a newly revealed system and state that it does not conform to a self-knowledge practice of any particular U.S. tribe
- National Museum of the American Indian, Essential UnderstandingsCultural diversity control
No single American Indian culture or language; knowledge and identity are tied to distinct communities, places and languages
- National Museum of the American Indian, The Impact of WordsEditorial language control
Avoid generalization, use specific communities where possible, and write about Native peoples in the present tense
- Native Governance Center, How to Talk about Native NationsNative-led terminology control
Use nation-specific names, respect sovereignty and distrust any supposedly comprehensive guide to hundreds of distinct nations
- IllumiNative, What's In and What's Out in Native RepresentationNative-led representation control
Prefer specific nations and cultures; avoid Pan-Indian composites, mystical stereotypes and unsanctioned cultural imagery
- Lisa Aldred, Plastic Shamans and Astroturf Sun DancesAcademic reception context
Peer-reviewed analysis of New Age commercialization of Native American spirituality, American Indian Quarterly 24.3 (2000), 329–352
- National Park Service, The Medicine WheelTradition-variation control
Medicine-wheel forms, colors, materials and uses vary among tribal customs; the symbol is not one fixed zodiac table
Quarantined, not forgotten
One universal Native American zodiac: Rejected because Native nations have distinct languages, cultures, governments and knowledge traditions; the singular label collapses them.
A birthday-to-animal calculator: Rejected because it would present one authored 1980 system as a shared cultural calendar even when the disclaimer says otherwise.
Animal personality and compatibility profiles: Held because reproducing the copyrighted modern table is unnecessary to explain its provenance and would turn critique into product expansion.
Medicine-wheel history treated as proof of Earth Astrology: Rejected because real wheel symbols, sites and teachings vary; their age does not backdate the book's zodiac structure.
Generic tribal art, feathers or medicine-wheel decoration: Rejected because non-specific composites reproduce Pan-Indian representation and may use cultural imagery without permission.
A nation's teaching summarized without that nation's source: Held until the nation is named and its own public institution, knowledge keeper or approved resource supports the description.
The Tibetan foundation
A mathematical study and an auditable implementation establish the Phugpa conversion. Tibetan studies references control the rabjung, animal, element and gender language. The convention is named because Tsurphu and other living calendars can disagree with it.
- Svante Janson, Tibetan Calendar MathematicsPhugpa algorithm authority
Lunisolar arithmetic, leap months and days, 1027 convention, and differences among Phugpa, Tsurphu and other calendars
- Tibetan and Himalayan Library, Tibetan calendar converterHistorical naming control
Animal, element and rabjung as the three-part year identifier; first cycle in 1027; Losar spanning Western years
- Alexander Berzin, Animal-Signs and ElementsAstrological structure authority
Twelve Tibetan animals, five empowering elements, male/female pairing and the sixty-year cycle beginning with Fire Female Hare
- @hnw/date-tibetanAuditable implementation
MIT-licensed JavaScript implementation of Janson's Phugpa conversion formulas, including leap months and leap days
- Library of Tibetan Works and Archives, official holidays 2026Modern Losar fixture
Tibetan New Year on 18 February 2026, independently controlling a public calculator boundary
Quarantined, not forgotten
One Losar date presented as universal: Rejected because Phugpa, Tsurphu and regional calendars can differ; every conversion here is labelled Phugpa.
Generic animal personality cards: Held because a year animal is only one input within Tibetan element calculations, not a complete natal reading.
Year animal treated as Kalachakra astrology: Rejected because the animal-element cycle and the calendar's Indian-derived astronomical calculations are related layers, not synonyms.
Chinese stems copied into Tibetan data: Rejected because Tibetan nomenclature directly pairs element, gender and animal rather than publishing the ten Heavenly Stems.
The modern Celtic tree-calendar foundation
Graves and his reception history establish the twentieth-century calendar. Museum and university sources establish the much older ogham evidence without letting an alphabet become proof of birth signs. A practitioner table controls the selected fixed date version.
- Robert Graves, The White GoddessSystem origin
The 1948 work in which Graves set out the Beth-Luis-Nion tree-calendar reconstruction
- Robert Graves Review, Witchcraft, Graves, and the BLN Tree CalendarReception history
Graves constructing or refining the calendar by 1946 and its adoption in modern witchcraft from the 1960s
- National Museum of Ireland, Ogham CodeArchaeological control
Ogham as Ireland's earliest known writing, mainly fourth- to sixth-century memorial inscriptions
- University College Cork, The Irish Tree AlphabetLetter and plant control
Twenty ogham characters and modern educational plant glosses; not a calendar source
- CELT at UCC, Auraicept na n-ÉcesManuscript control
The medieval grammatical and ogham tract tradition from which later tree-alphabet claims were developed
- Peter Berresford Ellis, The Fabrication of Celtic AstrologyCritical history
Published criticism separating Graves-derived tree astrology from evidence for ancient Celtic calendars
- Feraferia, Tree Alphabet CalendarPractitioner date control
The fixed Dec 24–Dec 22 thirteen-by-twenty-eight-day mapping used by the public calculator
Quarantined, not forgotten
Graves's calendar called ancient Druid practice: Rejected because the thirteen-month BLN scheme appears in Graves's twentieth-century reconstruction, not in an ancient or medieval calendar source.
Ogham evidence treated as calendar evidence: Rejected because inscriptions and grammatical tracts establish writing and letter lore, not thirteen birth signs.
Unattributed tree personalities: Held until claims are traced to named modern authors; none is presented as ancient Celtic tradition.
Thirteen- and twenty-one-tree systems merged: Rejected because later popular variants use different sign counts, special solar days and date ranges.
23 December forced into a tree: Rejected because the selected thirteen-by-twenty-eight-day mapping leaves one intercalary day outside the months.
The ancient Egyptian decan foundation
Museum objects and a current corpus project establish the diagonal star-table structure. The ideal-table database controls what can and cannot be harmonised. Dendera, one named modern book and two modern table witnesses are dated separately so none becomes proof of Middle Kingdom natal signs.
- Museo Egizio, The Diagonal Star Tables of Ancient EgyptCurrent corpus control
The 12-row by 36-column structure, Middle Kingdom coffin context, 27 known tables and the ongoing critical re-edition of the corpus
- McMaster Ancient Egyptian Astronomy, Description of a Diagonal Star TableStructural and variation control
The ideal table, ordinary and triangle decans, and the warning that no surviving table follows the ideal exactly
- The Metropolitan Museum of Art, Telling Time in Ancient EgyptCalendar control
Twelve day and twelve night hours, decans as night-time markers, the 360-day civil year and five epagomenal days
- British Museum, coffin of Hornedjitef (EA6678)Object and chronology control
A Ptolemaic coffin preserving decan imagery and the museum's account of star tables first appearing around 2100 BCE
- The Metropolitan Museum of Art, Astronomical Ceiling from the tomb of SenenmutNew Kingdom object control
Public-domain facsimile of the c. 1473–1458 BCE ceiling, with planets, decans, constellations and month circles identified
- Musée du Louvre, Zodiac of Dendera (E 13482)Ptolemaic object control
The temple ceiling dated to 50 BCE and catalogued with zodiac, decans and constellations
- The Met, The World between EmpiresZodiac lineage control
Museum publication distinguishing the Babylonian origins of the zodiac and horoscopes from their later combination beyond the cuneiform world
- Jonathan Dee, Isis: Queen of Egyptian MagicNamed modern reception witness
A 2005 Sterling edition of a popular divination work whose contents include an Egyptian zodiac; not used as evidence for ancient practice
- TheCollector, Egyptian AstrologyModern variant witness
An explicit modern framing of the discontinuous Nile-plus-eleven-deities date table; not used as an ancient-history authority
- Givnology, The Egyptian ZodiacModern variant witness
An accessible consecutive-period deity table attributed to page 138 of Dee, demonstrating that popular versions do not share one sign set or date contract
Quarantined, not forgotten
One harmonised list of thirty-six ancient names: Held because the decan list is characteristic of an individual table, surviving tables vary, and the full corpus is currently being critically re-edited.
A modern birthday mapped to an ancient coffin-table decan: Rejected because the 365-day civil calendar drifted against the solar year and the tables model stellar timekeeping, not a continuous Gregorian natal convention.
Dendera treated as the source of the Middle Kingdom tables: Rejected because the objects are separated by roughly two millennia and the later ceiling includes the zodiac alongside Egyptian decans.
Modern deity date ranges presented as pharaonic astrology: Rejected because the surveyed museum and academic sources do not document that birthday system, while named versions occur in modern popular publishing and disagree in structure.
Unattributed decan or deity personalities: Held until a claim can be tied to a named historical or modern tradition without crossing the timekeeping, Hellenistic and popular layers.
The Chinese foundation
Government calendar tables establish the public cycle and every calculator boundary. Han text and Tang material evidence establish use without turning a later origin legend into history. As with the Vedic foundation, these are structural claims rather than personality votes.
- Hong Kong Observatory, Heavenly Stems and Earthly BranchesCycle authority
Ordered stems, branches and all 60 Gan-Zhi pairs
- Hong Kong Observatory, The 12-Year Animal CycleAnimal/branch authority
Twelve animals, their branches and use by about 100 CE
- Hong Kong Observatory, Gregorian-Lunar Calendar Conversion TablesCalculator boundary
Annual civil-calendar tables, 1901–2100
- Wang Chong, Lunheng — WushiClassical textual evidence
Branch-animal correspondences in an Eastern Han text
- Wang Chong, Lunheng — YanduClassical dragon evidence
Chen corresponds to dragon; Si corresponds to snake
- Metropolitan Museum of Art, Set of twelve zodiac animalsMaterial and historical control
8th-century set; curatorial history of the conventional sequence
- University College London, The Homological CosmosCompatibility context
Ethnographic study of Chinese correlative reasoning, including zodiac-animal marriage matching
- Wudang Foundation, Twelve Earthly BranchesBranch-relation control
Six Harmonies, Three Harmonies and Six Clashes as relations inside a larger Four Pillars grammar
- Feng Shui Institute, Chinese Astrology CompatibilityPopular-practice table
Four year-animal trines and the six opposite clashes
Quarantined, not forgotten
The Great Race as literal origin history: Kept as folklore, not used to date or explain the historical cycle.
Unattributed year-animal personality lists: Held until personality claims have a source-by-source Chinese corpus.
Gregorian year equals zodiac year: Rejected because it mislabels every birth before lunar new year.
A love percentage from two year animals: Rejected because named branch relations do not supply a numerical score, and complete BaZi comparison uses all four pillars.
The Japanese foundation
National library and observatory references establish the Japanese readings, all sixty pairs and the hard calendar break in 1873. A national museum history keeps the branch cycle inside—but distinct from—the much broader history of Onmyodo. These sources support structure and chronology, not personality verdicts.
- National Diet Library, Kanshi: the sixty combinationsCycle and language authority
Eto, the ten stems, twelve branches, native readings and all sixty pairs
- National Astronomical Observatory of Japan, The twelve branchesBranch authority
Ordered branch characters, Japanese readings, directions and double hours
- National Astronomical Observatory of Japan, Readings of the sixty KanshiReading control
The sixty stem-branch combinations and their Japanese readings
- Okayama Prefectural Library, Why is 子 read ne?Animal-name control
Dictionary-backed Japanese branch/animal correspondences, including sheep and boar
- National Diet Library, The arrival and spread of calendarsLineage authority
553 request to Baekje for a calendar expert and texts; the later court calendar office
- National Diet Library, Japanese calendar timelineChronology control
554 calendar expert from Baekje, first recorded use in 604 and reform in 1873
- National Diet Library, From Edo to the Meiji calendar reformCalculator boundary
Meiji 5, month 12, day 3 became Gregorian 1 January 1873
- National Museum of Japanese History, Who were the Onmyoji?Scope control
Onmyodo encompassed official calendars and astronomy as well as divination and ritual
Quarantined, not forgotten
Unattributed eto personality lists: Held until Japanese claims have a fixed, source-by-source corpus rather than recycled pan-Asian copy.
January 1 projected onto pre-reform Japan: Rejected because dates before 1873 belonged to historical Japanese lunisolar calendars.
Eto treated as a synonym for Onmyodo: Rejected because stem-branch notation was one calendrical instrument inside a much broader historical field.
Chinese English labels copied unchanged: Rejected where Japanese convention specifically supplies sheep and wild boar rather than goat and domestic pig.
The Vedic foundation
This phase makes structural and astronomical claims, not twelve personality verdicts, so forcing it through the Western twelve-voice panel would manufacture comparability. Each field instead names its textual locus; the calculator has a government-history anchor, an IAU precession model and independently transcribed ephemeris fixtures.
- Varahamihira, Brihat Jataka (trans. Swami Vijnanananda, 1912)Classical rashi structure
Chapter I, especially verses 4–12
- Mantreswara, Phaladeepika (IGNCA scan)Classical control text
Government of India scan; consulted as a control, not counted as a second vote
- Calendar Reform Committee report (1955)Lahiri reference zero
Ayanamsa of 23°15′ on 21 March 1956
- N. C. Lahiri, Advance EphemerisIndependent calculator fixtures
Mean ayanamsa table: 1950, 2000, 2025, 2050
- Capitaine, Wallace & Chapront, IAU P03 precession (2005)Reference-frame propagation
General precession in longitude polynomial
- Vedic Heritage Portal, Jyotisha VedangaEarly-history boundary
Jyotisha as calendrical astronomy for ritual timing
- Audrius Beinorius, Followers of the Stars (2003)Historical synthesis
Early sources and cross-cultural development of Indian astrology
Quarantined, not forgotten
The Hindu Book of Astrology (New York, 1902): It uses fixed tropical sun-sign dates and is not evidence for classical Jyotisha.
Unattributed modern Vedic personality round-ups: They are held out until personality claims have a source-by-source corpus of their own.
The classical panel
Read cover to cover rather than searched, so an absence means the text does not say it rather than that nobody looked. Where a modern translation is still in copyright, an older public-domain edition was used and is named below — this matters, because a claim is only as checkable as the edition it is quoted from.
- Claudius Ptolemy (trans. J. M. Ashmand, 1822)antiquity · cited on 12 of 12 signs
Tetrabiblos, tr. J. M. Ashmand, 1822 (public domain). Not Robbins' 1940 Loeb, which remains in copyright.
- Marcus Manilius (trans. Thomas Creech, 1697)antiquity · cited on 8 of 12 signs
Astronomica, tr. Thomas Creech, 1697, via the Oxford Text Archive. Explicitly not Goold's 1977 Loeb, which remains in copyright.
- Julius Firmicus Maternusantiquity · cited on 5 of 12 signs
Matheseos libri VIII, from the public-domain Latin and older English renderings. Not Bram's 1975 translation, which remains in copyright.
- William Lilly17th century · cited on 10 of 12 signs
Christian Astrology, 1647. Pagination follows the Regulus facsimile rather than the Wikisource transcription, which is paginated differently.
- Alan Leo (William Frederick Allan, 1860-1917)19th century · cited on 8 of 12 signs
How to Judge a Nativity and Astrology for All, 1899–1912.
- Raphael (house pseudonym; title page reads "The Astrologer of the Nineteenth Century, Author of the 'Prophetic Messenger'")19th century · cited on 4 of 12 signs
Raphael's Guide to Astrology — a house pseudonym carried by several authors across the nineteenth century, not one writer.
- Sepharial (Walter Gorn Old)19th century · cited on 12 of 12 signs
The Manual of Astrology and related works.
The contemporary panel
Chosen for coverage rather than quality: each of these publishes a full entry for all twelve signs, which is what a fixed panel requires. They are the answer to “does anyone still say this today”, not an endorsement of anything they say.
- The AstroTwins (Astrostyle)modern · cited on 12 of 12 signs
- Cafe Astrologymodern · cited on 12 of 12 signs
- Horoscope.com editorial staffmodern · cited on 12 of 12 signs
- Wikipedia contributorsmodern · cited on 12 of 12 signs
- ZodiacSign.commodern · cited on 12 of 12 signs
One company, four websites
Horoscope.com, Astrology.com, Horoscopo.com and SunSigns.com are four properties of Horoscope.com, Inc., a subsidiary of Ingenio LLC. They count as one voice here. Four sites agreeing looks like corroboration and is not, and this is the single easiest way for an attestation count in this niche to be inflated without anyone lying.
SunSigns.org is a different publisher and is counted separately.
Supporting voices
59 further sources back individual claims. They are counted in a claim’s evidence but never in the headline number, because they cover the signs unevenly — a count including them would quietly mean something different on every row.
- Encyclopaedia Britannica editorsmodern · 6 signs
- Richard A. Parkermodern · 6 signs
- SunSigns.org editorsmodern · 6 signs
- Deborah Houldingmodern · 4 signs
- California Psychics editorsmodern · 3 signs
- Emily Ratay, YourTangomodern · 3 signs
- Susan Millermodern · 3 signs
- Trusted Psychic Mediums editorsmodern · 3 signs
- William Tyler Olcott19th century · 3 signs
- Astrology Answers editorsmodern · 2 signs
- AstroSagemodern · 2 signs
- Bee Wolf-Ray, LoveToKnowmodern · 2 signs
- Gennady E. Kurtikmodern · 2 signs
- Jaime McLeod, Farmers' Almanacmodern · 2 signs
- John H. Rogers, Journal of the British Astronomical Association, vol. 108modern · 2 signs
- Labyrinthosmodern · 2 signs
- Nina Kahn, Bustlemodern · 2 signs
- PrepScholar Blogmodern · 2 signs
- The Old Farmer's Almanacmodern · 2 signs
- Acharya Rajesh Gupta, DuAstromodern · 1 sign
- Arienne King, World History Encyclopediamodern · 1 sign
- Astro Librarymodern · 1 sign
- Astrodienst / astro.com (unattributed)modern · 1 sign
- Astrology Junomodern · 1 sign
- Astrology Kingmodern · 1 sign
- Astrology.Caremodern · 1 sign
- AstroShastramodern · 1 sign
- AstroZodify (unattributed)modern · 1 sign
- Augurine editorial staffmodern · 1 sign
- Bhakti Seva19th century · 1 sign
- Bonnie Gillespiemodern · 1 sign
- Cécile Michel, Centre for the Study of Manuscript Cultures (CSMC), University of Hamburgmodern · 1 sign
- Chani Nicholas / CHANImodern · 1 sign
- Chetna Sharma, Solacelymodern · 1 sign
- Cynthia Thinnes, Numerologysign.commodern · 1 sign
- Eleanor Robson, Bryn Mawr Classical Review 2005.06.29modern · 1 sign
- Elizabeth Mohn, EBSCO Research Starters (Astronomy and Astrophysics)modern · 1 sign
- Emma.ca editorsmodern · 1 sign
- Encyclopædia Britannica, 11th ed. (via Wikisource)19th century · 1 sign
- Francesca Rochbergmodern · 1 sign
- Ian Ridpathmodern · 1 sign
- Indie and Harpermodern · 1 sign
- Kalina Trifonova, AskNebulamodern · 1 sign
- Kamal Kapoormodern · 1 sign
- Karma & Luck editorial staffmodern · 1 sign
- Liz Greene, Theosophical Society in Americamodern · 1 sign
- Marcus (DarkStarAstrology.com)modern · 1 sign
- Medical History, vol. 22, no. 2modern · 1 sign
- mindbodygreenmodern · 1 sign
- MoonOmens.com editorial staffmodern · 1 sign
- PsychicSource editorial staffmodern · 1 sign
- PureWow editorial staffmodern · 1 sign
- Refinery29 editorial staffmodern · 1 sign
- SelfGazermodern · 1 sign
- Sonali O. Vermamodern · 1 sign
- Today.com / NBC editorial staffmodern · 1 sign
- Vance Lim, Aurae Astrologymodern · 1 sign
- Wikipedia contributors (citing Richard Hinckley Allen, 1899)19th century · 1 sign
- William Smith (ed.), via LacusCurtius / University of Chicago19th century · 1 sign
How a claim is dated
Each claim is reduced to a concept, so that a fourth-century Latin adjective and a modern horoscope blog can be recognised as the same claim rather than two. The era of the earliest voice attesting it, and whether any contemporary voice still does, produce one of five verdicts:
- attested antiquity → present
- Said then, and still said. The only claims this site introduces as tradition.
- antiquity only
- The tradition said it; modern astrology dropped it.
- first attested 19th c.
- Reached us through the Edwardian popularisers, with nothing older behind it.
- 19th c. only
- The popularisers said it and it did not survive them.
- modern only
- No source before 1929 anywhere in this corpus.
Eras are printed as bands rather than years. The registry’s year column is not consistent enough to print — Ptolemy carries 1822, which is Ashmand’s translation and not the Tetrabiblos — and a page that has verified a specific year is the only place a specific year appears.