Grammar n sentences structures' correction requested

Dear sir/madam,
I will appreciate it very much if you kindly check out the grammar and sentence structures. Thanks.

Part 2. Dashain

According to Hinduism, it symbolizes the victory of the good over the evil. Goddess Durga with the powers from all the Gods killed the demon, Mahishasura, who had created terror in the world of Gods. It took ten days’ battle to defeat Mahishasura. That’s why the first nine days of Dashain symbolizes the battle and the tenth day, a big celebration. Goddess Durga is worshipped as a divine mother Goddess. It is also referred to as Durga Puja. Throughout the festival people pay homage to the various forms of the supreme Goddess Durga. It is believed that if she is worshipped properly and pleased then good luck is bound to happen. But if she is not properly worshiped and neglected then misfortunes are bound to happen.
The festival falls around Sept.- Oct., starting from the bright lunar fortnight and ending on the day of full moon.
This festival is celebrated for 15 days and in many ways such as by flying kites, playing cards, gambling (though it’s illegal it is allowed only during this festival). Buying new cloths and wearing them is an important part of this festival. Great feasts are held in the homes of everyone, even among the poor and those who are under the poverty line. Almost all the shops have festival offers and discounts.

Bamboo swing (“ping” in Nepali) are constructed in many parts of the country as a way of celebration. This kind of swings present the best of local culture, tradition, community spirit and fun. You can see people of all ages enjoying in the swing. These swings are constructed before Dashain and dismantled only after “Tihar” another festival that comes after Dashain. Different kinds of fairs and celebration events are organized in villages with the ferries wheels for children and other items of entertainment for the adults. Thousands of animals such as buffalo, pigs, goats, etc. are slaughtered. Almost all the temples esp. Durga and Kali temples of the country are offered with thousands of sacrifices.
Ghatasthapna marks the beginning of Dashain. On this day, the Kalasha (pot) is filled with holy water which is then covered with cow dung and sewn with barley seeds. Then the Kalasha is put in the center of a rectangular sand block. The remaining bed of sand is also seeded with grains. The Kalasha vessel is worshipped twice a day. It is kept away from sunlight. Holy water is offered to it everyday so that by the tenth day the seed will have grown to five to six inches long yellow grass. It is sacred and called as “Jamara”.
The seventh day is called as “Fulpati”. The eighth day is called as “Maha Astami”. The ninth day is called as "Maha Navani " which literally means the great ninth day. This day is the last day of Navaratri. Ceremonies and rituals reach the peak on this day.

The tenth day is the “Dashami”. On this day, a mixture of rice, yogurt, vermilion is prepared by the women. It’s known as TIKA. Elders put TIKA and Jamara on the forehead of younger relatives to bless them with abundance in the coming years. Elders give “Daksina”, or a small amount of money to younger relatives at this time along with the blessings. This continues to be observed for 5 days during which period family and relatives visit each other to exchange gifts and greetings.
The last day of the festival which lies on the full moon is called “Kojagratha” Purnima".

  1. Dashain (festival of Hindus)

Dear sir/ mams,
Could you check out the grammar mistakes and modify the sentences where required? Thanks

Nepal was the only Hindu country until 2008. But now,there is no monarchy system in Nepal, it has been declared a secular country. I wonder why Dashain, the biggest festival for Hindus, is still regarded as the longest and the most auspicious festival in the Nepalese annual calendar. It’s not only the longest festival but also the one which is most anticipated. The reason why this is so is because the majority of Nepalese are Hindus, and the people living in remote villages have been following this tradition from generations and are completely unaware of other religions. Nepalese in the cities who are non Hindus also celebrate this festival. This festival is a “Bada Dashain”, “Dashera”, “Vijay Dashami”. This festival is also known for its emphasis on the family gatherings. Nepalese return from all parts of the world, as well as different parts of the country, to celebarate together. All government offices, educational institutions, and other offices remain closed during the festival.
According to Hinduism, …

Thank you so much.