Dushera is one of the most important festival of the Hindus.It is celebrated for nine days and hence also known as Navratra.Navratra festivties begin in first night of the month of aswin.
It is celebrated in the honour of goddness of durga . the nine nights are observed as occasions of fasting and prayer in honour of durga.Navratra is also known as Durga puja .The goddness is worshipped in her nine warlike manifesation.
on the last day is celebrated Vijay Dashmi.One legend behind Vijay Dashmi in the lord Rama killed Ravana ,Meghnath and kumbhkaran on this day and it is said that evils are defeated this day.
All across the country effigies of Ravana and his brother are burnt on the Vijay Dashmi . Durga puja is the most popular festival of West Bengal.

On the last day    
thanxx dear
but i wanted 15 mins speech