Vijayadashmi or Dussehra is celebrated on the 10th of Shukla paksha of Ashwin month. The day marks the victory of Goddess Durga over demons like Shumbh and Nishumbh. This year Dussehra will be celebrated on October 6, Thursday.
It is a day when devotees worship Goddess Shakti. Shakti represents strength, ability and courage. This day also celebrates the victory of Lord Rama over the demon king Ravana.
The battle between Lord Rama and demon king Ravana shows that the truth will always defeat the evil. This festivals gives the message to all being to win over the evils of lust, anger, greed etc inside him/her.