Sri Venkateswara Swami vari Brahmotsavam or Srivari Brahmotsavam or Purattasi Brahmotsavam is the most significant annual fête celebrated at the Venkateswara Temple in Tirumala-Tirupati, Tirupati district, Andhra Pradesh, India. which falls between the Telugu calendar of Aasveeyujamu and the Gregorian calendar months of September or October. Wikipedia