All the Utsavam taking place in Srirangam Sri Ranganathaswami are special. During Margazhi month Thiruadhyayana Utsavam ( Vaikunda Ekadasi Thirumozhi, Thiruvaimozhi Days) is most important utsavam conducted in very grand manner with Pagal pathu Irrapathu and Iyarpa which take place for 21 days. During Pagal Pathu Sri Namperumal Purappadu, asthanam at Arjuna Mandapam and in Thirumamani Mandapam ( thousand pillars mandapam) for Irrappathu, All azhwar, Acharyas will give sevai with perumal at Thousand pillar mandapam during Irrappathu Days. During Arayar Sevai ( darshan with Abhinayam) Thirumozhi is recited during Pagal Pathu and Thiruvaimozhi on Irrappathu days. On 10th Day of Pagal Pathu Sri Namperumal gives darshan on Mohini Alankaram and on vaikunda ekadasi Sri Namperumal adores Rathnangi and Moolavar on Muthangi. Namperumal Vedupari (Kudhirai Vahanam rides) will be on 10th day of Irrappathu Utsavam. On irrappathu satrumurai, thousands and thousands of devotees assemble at thirumamani mandapam for having darshan of Nammazhwar Moksham.This utsavam gives more importance to Azhwars and Nalayira Divya prabhandam and is conducted from the period of Thirumangai Azhwar. All Astikas are invited to attend the Thiruadhyayana Utsavam and get the blessings of Azhwar, Acharyas and Sri Namperumal.