Guru Nanak ( 24 November 1496 - 10 October 1539 ) was the founder of Sikhism and first of the ten Sikh Gurus .His birth is celebrated worldwide as Guru Nanak Gurpurab on Kartik Poornima , the full moon day in the month of Katak , October - November . Guru Nanak travelled far and wide teaching people the message of one God who dwells in everyone of His creation and constitutes the internal truth . He set up a unique , spiritual , social . political platform based on equality, goodness and…