Former Prime Minister Manmohan Singh on Thursday accepted Punjab Chief Minister Captain Amarinder Singh's invitation to join the latter for the first jatha to the Kartarpur Gurudwara on November 9 when the much-anticipated Kartarpur corridor will be opened to Indian Sikh pilgrims. The day also marks the 550th birth anniversary of Guru Nanak, the founder of Sikhism and the first of the ten Sikh Gurus.