On the auspicious month's last day- Karthik Purnima, India is celebrating three pious festivals- Karthik Purnima, Dev Deepawali, and Gurupurab. Today is the 550th birth anniversary of Guru Nanak Dev Ji, this is one of the most auspicious festivals celebrated by the Sikh community. In other parts of India, this day is also celebrated as Karthik Purnima and Dev Deepawali.