You shall fav is deepavali becase there is an speacial incedent in vikunta narakasura was abad,the three worlds were suffering so,indra The lord of swargawent to vishnu hearing the story he rushed to narakasura with his wife satyabhama and killed narakasura.and that day rama finished his vanvasa (14years living in forest).everyone in ayodya nagara welcomed rama with is a speacial day for bisnussman as that dayfor them the festival is newyear.