Yajur Upakarma 2013'The period of study: Nine years, called Adhama, not very auspicious, Twelve Years,Madhyaman, Acceptable, Eighteen Years,Uthamam, The best. There were also people who were doing the Adyayana, or the learning of the Vedas, for thirty-six years or through out their Life. One can remain a Brahmachari, without marrying through out Life learning the Vedas. There were Two Terms in a year.
Adi Shankaracharya Did Not Establish Shankar Mutts
Shankaracharya did not establish Shankar Mutt. So this places Sambandar 4300 BC! Then Shankaracharya dates back to between 4300-4000 BC! But the Bhakti Literature mentions Gnana Sambhanda around 7 Century AD when Tirunavukkasar is mentioned as a contemporary of Sambanda. This is supported by to other evidence in Tamil. So Shankaracharya’ date may be after 7 Century AD. Now to the view that Shankaracharya did not establish the four Mutts.
Manu Rama’s Ancestor Migrated From South India 5000 BC
Manu,Rama's ancestor migrated from South India. Taking into account these details the Birth date of Lord Rama is January 10 in the year 5114 BC This and Agasthya’s date tally. Therefore if Rama’s ancestor has left for Ayodhya from Dravida , it should have been before 5000 BC. “Manu had many sons of whom 50 perished quarrelling with one another. Ten sons survived, one of whom was Ikshvaku. The Brahma Purana (Chapters 7 and 8) provides