Former Prime Minister Of India Dr Manmohan Sigh Celebrates His 91st Birthday On September 26, 2023. Singh Was Born In 1932. Dr Manmohan Singh Served As India's Prime Minister From 2004-14. Several Political Leaders Took To X To Wish Singh On His Special Day. Prime Minister Narendra Modi Said, “I Pray For His Long Life And Good Health.” Congress President Mallikarjun Kharge, Congress Leader Rahul Gandhi And Tamil Nadu CM M K Stalin Also Wished Manmohan Singh On His Birthday.