Complex sentence: It is famous for the ancient Rama Mandir where Sri Ram is worshiped annually for nearly four months from Rama Navami in the hindu month of Chaitra until to the end of Shraavana.
Split into simpler sentences: It is famous for the ancient Rama Mandir where Sri Ram is worshiped annually. The ceremonies last for nearly four months starting on Rama Navami in the Hindu month of Chaitra, lasting until to the end of Shraavana.