Marriage Compatibility by Birth Month

Marriage compatibility according to birth month fails at the first step, because a civil month is not a sidereal sign. Under the Lahiri ayanamsa the Sun changes rashi about three weeks after the tropical date people memorise, so most months contain two solar rashis. A March birthday is still Kumbha, since the sidereal Sun enters Meena only in April, and that single-month clarity is rare. May, August, and November do not behave so neatly. Two people born in the same month can have Suns in neighbouring signs and Moons in any of the twelve. Their 7th houses depend on their lagnas, which change through the day. A compatibility table of twelve months is a table of calendar labels.

Even if the month did fix the Sun, guna milan would still ignore it. The eight kootas score the Moon's nakshatra: Varna, Vashya, Tara, Yoni, Graha Maitri, Gana, Bhakoot, and Nadi, totalling 36. Nadi alone is 8. Two August births can share a nadi or avoid it. The month cannot tell. Bhakoot compares the Moon signs for 6/8 and 2/12, not the birth certificates. After the points, each 7th lord and each Navamsa still have to be read. A couple born in 'compatible months' with 7th lords in the 6th and the 8th is not compatible by the rule that matters. A couple born in months a website calls a clash can have a clean nadi and strong 7th lords.

The Sun's sign is worth reading as the Sun, inside each chart separately. A Sun in Makara is a solar placement in Saturn's sign. It says something about authority and the father. It does not say whom to marry. Vimshottari does not start from the Sun's month. It starts from the Moon's nakshatra, so the wedding's timing is invisible to a month table. If a family only knows the month and not the birth time, the honest limit is severe: the lagna is unknown, the 7th house is unknown, and only a noon-chart guess would fake them. Do not guess. Get the time if marriage is the question. The month is already on the certificate. It is the least decisive part of it.