Guru Nanak Gurpurab, dedicated to the first Sikh Guru - Guru Nanak Dev - is being celebrated across India and parts of the world with great joy. What makes the day even more special this year is that this is 550th birth anniversary of Guru Nanak Dev. Guru Nanak Gurpurab, also called Guru Nanak Dev Jayanti and Guru Nanak Prakash Utsav is one of the most auspicious days.