On this day Rama and Sita fasted, and Surya Shashthi and Chhath Puja was performed by Mata Sita. Hence, she was blessed with Lava and Kusha as sons.
In Champaran (Bihar, India) and Madhesh Province (Nepal), it is a belief that after leaving Ayodhya, Sita stayed in Valmiki Ashram located on the edge of the Narayani (Gandaki) river in Chitwan district, on the India–Nepal border. During that time, she celebrated Chhath Mahaparva in Nepal.
In Munger region, the festival is known for its association with Sita manpatthar (or Sita Charan; lit. 'Sita's footsteps'). It is believed that the goddess Sita performed Chhath festival in Munger. Sitacharan Temple, situated on a boulder in the middle of the Ganges River in Munger, is the main center of public faith regarding the Chhath festival.





