Choose and read zodiac coordinates

Match the coordinates to the question: Western Sun-sign symbolism, exact planetary contacts, Chinese calendar pillars or Vedic Moon-based rules. Each tool displays its selected convention with the result.

Different traditions, different coordinates

Tradition	Starting coordinate	Compare
Western tropical	The seasonal zodiac begins at the March equinox. Sun signs use one planet; synastry uses the whole chart.	Twelve-sign matrix · Exact charts
Western sidereal	A named zodiac origin shifts the sign labels. The chart calculator offers a Lahiri 1956 anchor or your entered offset.	Sidereal charts
Chinese year animals and BaZi	Year signs use New Year or Li Chun; BaZi adds exact solar months, days and hours.	Year signs and pillars
Vedic Moon matching	Moon longitude determines rasi, nakshatra and pada. Eight-component and ten-component traditions have separate tables.	Kundli and porutham
Numerology	Date digits or the spelling of a name determine the number under a selected reduction convention.	Visible number arithmetic

Western sign dates, elements, modalities and rulers describe the signs. A seasonal Sun sign date range is a convenient lookup; the birth finder resolves the actual ingress at the birth instant.

Regional animal names

Vietnamese year names use Cat in the fourth place and Water Buffalo in the second. Tết follows the Vietnamese lunar calendar: choose the local year boundary when it differs from a Chinese calendar date. Japanese eto year symbolism uses Rabbit and Boar and appears on New Year cards, shrine offerings and seasonal objects. Japan adopted the Gregorian calendar on January1,1873. Today’s January New Year customs should be distinguished from historical lunisolar reckoning and from Shichu Suimei four-pillar astrology.

Regional accounts: Vietnam News Agency · Nippon.com’s eto cultural guide · National Diet Library calendar history · National Diet Library’s historical four-pillar manual.

What changes when a birth time is unknown?

Coordinate	Known time	Unknown local date
Sun and slow planets	Position at the entered clock; a minute-only time keeps its minute interval.	All possible sign labels across the local day remain visible near an ingress.
Moon and nakshatra	Exact Moon longitude and the applicable mansion/quarter.	The date may span two signs, mansions or quarters; matching displays the possible component range.
Ascendant and houses	The local horizon and house frame are calculated from time and coordinates.	Omitted. Entering noon as a guess would create an unsupported horizon frame.
BaZi hour and day boundary	Hour pillar follows the chosen clock; choose midnight or Zi23:00 for the day change.	Hour omitted; any day-pillar alternatives remain explicit.

A repeated daylight-saving hour needs the earlier or later occurrence. A skipped clock time needs correction. Use the named birthplace zone for its historical clock rules, and enter coordinates when a horizon frame is needed.

Compare with an unknown time

Reading scores and labels

The Sun-sign chart reports element, modality, polarity, ruler and whole-sign distance. Its relationship themes are symbolic descriptions. The exact synastry view reports each contact and its orb rather than an overall percentage.

Ashtakoota adds eight raw components with maxima1+2+3+4+5+6+7+8=36. The named table and person roles determine those points. Porutham displays ten separate rules, with partial findings kept visible; its count is a different quantity. Chinese branch relations describe named combinations, while numerology retains its reduction steps. Compare the displayed factor before comparing a total between systems.

Inspect all eight score components

Chart terms at a glance

Longitude: Position around the ecliptic, from0° to360°. Twelve signs divide it into30° sections.
Latitude: A sky position north or south of the ecliptic; geographic latitude instead locates a place on Earth.
Declination: A sky position north or south of the celestial equator; compare its signed values for parallels and contraparallels.
Ascendant / rising sign: The eastern horizon’s intersection with the ecliptic at the chosen clock time and location.
Midheaven / IC: The two intersections of the local meridian with the ecliptic; the Midheaven is the upper intersection.
Aspect / orb: An angular relationship between positions; orb is the distance from its exact angle.
House / overlay: A sector in one chart’s place-and-time frame; an overlay places another chart’s point in that sector.
Retrograde / direct: Backward or forward change in geocentric zodiac longitude.
Ayanamsa: The zodiac origin offset subtracted from tropical longitude for a named sidereal convention.
Nakshatra / pada: One of 27 sidereal lunar mansions; each has four quarters, for 108 padas.
Navamsa / D9: The ninth harmonic sign position: multiply sidereal longitude by 9 and wrap around 360°.
Stem / branch / pillar: A stem–branch pair names a Chinese calendar coordinate. BaZi combines year, month, day and hour pillars.
Composite / Davison: Planetary midpoints make a composite; an actual midpoint time and geographic place make a Davison chart.
Progression / transit: A secondary progression advances the natal sky by a day-per-year convention; a transit compares the sky on a selected later date.

Choose a specific planet contact or house overlay to put these terms into a comparison.