The Maha Prathosha Abishekam of the The Maha Nanthi in the Thanjavur Big Temple The Prathosham that falls on any Saturday is called Maha Prathosham.(Sani Prathosham) Worshipping Siva on this day is bound to give the efficacy for a period of 5 years. Worshipping the Pradhosha Utsava Moorthys(procession of the idols along the corridors) is equal to witnessing the rejuvenation of three temples (Kumbabishekam) and also equal to visiting 100 holy shrines. So, visit and watch the video of the Maha Prathosham http://www.heritagetown.org/thanjavur.html