Methodology & Sources
Zodiac sign & cusp dates
We use the standard tropical zodiac date-range convention cited by the majority of general-audience astrology references. Because published sources genuinely disagree on boundary dates (often by a single day — for example, whether March 20 or March 21 is the true start of Aries), every boundary date on this site is explicitly flagged as a cusp date, naming the alternate sign, rather than silently picking one answer and hiding the disagreement. Daily and weekly horoscope predictions are out of scope here — see our sister site GetMyHoro for those.
Birthstones
Modern birthstone assignments follow the standardized list used by U.S. jewelry trade associations (formalized in the 20th century); traditional assignments reflect older, pre-20th- century custom. Where a month has multiple modern stones, all are listed.
Birth flowers
Birth-flower-by-month assignments come from the 19th-century floriography ("language of flowers") tradition, cross-referenced across multiple almanac sources. Regional variation genuinely exists — some almanacs assign a different secondary flower to the same month — and is noted on the relevant month page where it matters.
Numerology day number
The "day number" on each date page is a digit-sum reduction of the day-of-month only (e.g. the 23rd reduces to 2+3=5), with master numbers 11 and 22 preserved unreduced. This is deliberately narrower than a full numerology "life path number," which requires the complete birthdate and is out of scope for this site.
Famous birthdays & historical events
Each date page's famous-birth and historical-event facts are drawn from the general historical record, cross-referenced against standard encyclopedic and biographical references. Any date whose facts rest on a single source, or where sources genuinely disagree (for example, a traditionally-cited date for an event whose exact day isn't independently verifiable), is flagged as such in that page's content rather than stated as settled fact.
Source list
- Gemological Institute of America / Jewelers of America modern birthstone list — Standard modern + traditional birthstone-by-month assignments.
- 19th-century floriography (language of flowers) tradition, cross-referenced across multiple almanac sources — Birth-flower-by-month assignments; regional variation exists and is noted where relevant.
- Standard tropical zodiac date-range convention — Widely cited sign date ranges; ±1-day cusp variance between sources is disclosed explicitly on cusp date pages rather than silently resolved.
- General historical record (cross-referenced against standard encyclopedic and biographical references) — Famous-birth and historical-event facts per date. Each date-content file records which specific facts it draws on; any single-source or disputed date is flagged inline rather than stated as settled.
- Standard numerology digit-sum-reduction convention (day-of-month only, master numbers 11/22 preserved) — This site computes a 'day number' from the day-of-month only — not a full life-path-number calculation, which would require the complete birthdate and is out of scope.