Vanabojana ustavam is celbrated in SriperumbUdhur karthikai TiruvAdirai.
Morning perumAL and Swami reach the vanabhojana utsvama Mandapam (near the
arch of Bangalore highway.Thirumanjanam takes place

After upadesa rethinamalai gosthi and stothra pada gosthi -prasadham (kadhambam is distributed)
With all parapharnelia (nadhaswaram, pancha vadhyam, lighting , crackers) the irattai purappadu takes place in a grand manner