Why is Amavasya considered to be a bad day? In some cultures, Amavasya is considered to be a bad day as it is associated with darkness and negativity.What are the rituals performed on Amavasya? People perform various rituals on Amavasya such as performing puja to ancestors, taking a holy dip in the river, offering food and charity to the poor and needy, and performing meditation.It is believed that performing puja, meditation and charity on this day can bring peace, prosperity and happiness.