Jyotish Uses a Sidereal Zodiac

The sign of a graha is dignity: exaltation, own sign, or debilitation. The house from the lagna is the department: 7th marriage, 10th career, 9th fortune. The Vimshottari lord is the decade. A reading that calls itself a blueprint and then offers only the Sun sign has used one dignity of one graha. The lagna requires the birth time and the city, because the zone offset, including daylight saving, is applied before the Julian day. India needs no daylight-saving switch. Asia/Kolkata covers every Indian city, UTC plus 5 hours 30 minutes.

The sidereal zodiac stays with the stars. The tropical zodiac stays with the seasons. The gap is the ayanamsa. Lahiri is the ayanamsa used here. The practical result is that a person called one sign in a Western column may have the Sun in the previous sidereal sign. Their Sade Sati, their guna milan, and their dasha use the sidereal Moon regardless. Publishing a degree of the ayanamsa on this page would freeze a moving value, so the page names the method and lets the ephemeris hold the number.

Divisional charts add detail after the lagna is trustworthy. Navamsa for marriage, Saptamsa for children. They are slices of the birth moment, not later years. Transits are weather. If the blueprint cannot name the mahadasha, it is unfinished, and the missing piece is the Moon's star, which a birthday without a time may not even fix, because the Moon can change nakshatra that day. Start with time, city, sidereal signs, houses, and the balance of the birth dasha. Stop there until those five are real.