Question: On what date did a Canadian politician born January 2, 1979, succeed as leader of the New Democratic Party in Canada? 
Related documents: [0]  [DOC] Jagmeet Singh Jimmy Dhaliwal {'1': ", '2': ", '3': ", '4': "} (born January 2, 1979), known professionally as Jagmeet Singh ( ), is a Canadian politician who is leader of the New Democratic Party. [END] 
[1]  [DOC] The New Democratic Party (NDP; French: "Nouveau Parti démocratique" , "NPD") is a social democratic political party in Canada. The leader of the federal wing of the NDP is Thomas Mulcair, who was elected in the 2012 leadership election. He led the party through the 2015 federal election, and then lost a party leadership review on April 10, 2016. He was suceeded as leader by Jagmeet Singh, who won the 2017 leadership election on October 1st, with 53.8% of the vote. [END] 
Answer: 
October 1st
October 1st