Diwali celebrations are not limited to a day or two. Just after Dusshera, preparations for Diwali start. In total, there are 5 different festivals that fall close to Diwali..
This system of ashramas is believed to be prevalent since the 5th century B.C.E. in Hindu society. it still stands as an important "pillar" of Hindu socio-religious tradition.
Dev Uthani Ekadashi, also known as Prabodhini Ekadashi, is considered to be an auspicious day according to Hindu traditions. Day of Dev Uthani Ekadashi is devoted to Lord Vishnu.