29 April – Aby-election is held in Hong Lim afterOng Eng Guan resigned from his seat following expulsion from thePeople's Action Party (PAP). As two other candidates were disqualified, it is a contest between Ong and PAP'sJek Yuen Thong, which Ong regained his seat.[3]
16 August – The Singapore Association of Trade Unions (SATU) is formed after STUC's split earlier in July. The union is declared illegal in 1963 after conducting activities that threatened Singapore's national security.[15][16]
13 September – 9 October –Lee Kuan Yew delivered a series of 12 radio talks in English, Mandarin and Malay to campaign for a merger with Malaysia. This also includes exposing theCommunists' real ideology and reason for opposing the merger.[19]
16–17 September – The first Singapore Grand Prix is held atThomson Road.[20]
15 October – The Sang Nila Utama Secondary School is officially opened, making it Singapore's first Malay-medium secondary school. By 1968, it started to offer English-medium lessons.[21]
16 November – A White Paper on the proposed merger with Malaya is published. It outlines similar citizenships, passports and rights for Singapore citizens when in Federation, at least 15 seats in the Federal House of Representatives and two in the Senate, maintaining of Singapore's free port status, how the Head of State will be appointed, among others.[22]
