Sri Ramanujacharya Life History : 3.
HIS BIRTH::CHITRAI- TIRUVADHIRAI)
His date of birth is placed differently by different authorities.As per PPM, he was born in Kaliyuga year 4119 which corresponds to1017 AD. PPM fixes even the exact date as 13th April 1017 AD, interms of English Calendar.
PRA, though notes the year as 4118 Kali , maintains the year as 1017 AD only and gives additional information that the Rasi was Karkataka and the time of birth was exactly at noon.
VAC, MKS and MSR also agree on the year 1017. PTA gives a few more details like the Yogam being Ayushman, Karanam being Bhadra, Gotra being Harita, Saakha being Yajus, Sutra being Apasthambha and Sect being Vadama ( Vide p.45 of GLE).
PPM and ATA mention the year as Pingala, month Chitrai and the constellation Tiruvadirai. PPM adds that it was a Sukla Paksha Panchami, a Friday.
It will be for the Research minded scholars to piece together all these details to arrive at the correct date, time etc.
Vriddha Padma Purana presages his incarnation thus:-
" Long, long afterwards, the Lord himself will come down on earth as a Tridanda Sannyasin, to restore the good law. At that time heretics and men of perverted intellects will confuse the minds of the people. Aasuric Saastraas, based upon fallacious arguments and various schools of thought, very attractive and almost indistinguishable from the Vedanta, will turn away mens' hearts from Vishnu and cause them to forget His glory. That glorious incarnation will, through the good fortune of the Lord's devotees, come down upon earth, to explain and amplify the teachings of the great Sage Baadaraayana and the divine singer of the Gita. The holy one would compose a Bhaashya on the Vyaasa Sutras, to save men from the confusion and despair caused by spurious doctrines and lead them to the True faith" ( Vide p.44 of GLE)
While still a boy , he lost his father and was living with his mother at Kanchipuram under the protection of one 'Tiruk kachi Nambi' This Nambi was believed to converse and was on 'speaking terms' with Lord Varadaraja in the Archa form.
Next : EVENTS IN THE LIFE OF SRI RAMANUJA :