Chhath

Disclaimer - This is taken from Various sources

1. In the Chhath festival, worship is not done in the temples nor is there any cleanliness in the house.

2. Two days before the festival, on Chaturthi, food is eaten after retiring from bathing.

3. After fasting on Panchami, in the evening, after bathing in a pond or river, Arghya is offered to the Sun God. After that Alona (without salt) food is done.

4. On the day of Shashthi, a resolution is taken in the morning after bathing. Chant these mantras while taking a resolution.

5. Adya Amuk Gotro Amuk Namaham Mama with all sins, Shri Suryanarayanadevprasannarth Shri Suryashishthivrat Karishye for the health of the body.

6. Staying fast for the whole day and Neerja being waterless, again going to the river or pond and taking bath and offering Arghya to the Sun God.

7. There is also a method of offering Arghya. Put banana and other fruits, alona prasad, cane etc. in a bamboo soup and cover it with a yellow cloth. After that, keep the lamp in the soup and take the soup in both the hands, while reciting this mantra, offer Arghya to the Sun God after setting three times.

Reference -

https://hindi.webdunia.com/other-festivals/chhath-puja-2019-119103000083_1.html