Udayasthamana Pooja is of the special poojas held at Sabarimala Ayyappa Temple. And it is also considered as the busiest poojas at the temple, after Padi Pooja.
Udayasthamaya literally means from sunrise to sunset. Hence it implies worship from sunrise to sunset. Udayasthamana pooja is conducted from dawn to dusk (from Nirmalyam to Athazha pooja).
In addition to the Nithya pooja, special poojas with Archanas and Abhishekams are conducted to obtain the “Anugraham” of Bhagavan which enables to fulfill the wishes of the devotees. Out of the total 18 poojas, 15 are done before noon and there are 45 kalasabhishekams.