In Finland, the second largest age group in the country's history was born in 1948 (the largest in 1947).
1 January - The UK railways are nationalized.
January 1 - Arab militants besiege the Jewish district of Jerusalem's Old City.
1 January - The Constitution of the Italian Republic enters into force.
January 1 - The Hämeenlinna tax office was mainly connected to the city of Hämeenlinna, smaller parts also to the municipalities of Rengo and Vanaja. The township of Pargas was separated from the municipality called Pargas, which was renamed the Parish of Pargas. The name of Pieksämä was changed to Pieksämäki.
January 2 - The inaugural meeting of Neste Oy was held in Helsinki.
January 4 - Burma gained independence from Britain and excluded from the British Commonwealth.
January 4 - The Soviet Union and Romania sign the YYA.
January 15 - Finland is accepted as a member of the International Monetary Fund and the World Bank.
January 15 - SKP's political committee decides to remove Yrjö Leino from the party's governing bodies.
January 17 - Armistice between Indonesian nationalists and Dutch forces in Java.
January 17 - Lieutenant General Grigori Savonenkov, who had been appointed Soviet Ambassador to Finland and previously served as Deputy Chairman of the Supervisory Commission, arrived in Helsinki with his wife. The arrival of Savonenkov in the general's uniform attracted attention.
January 18 - The Soviet Union and Hungary sign the YYA agreement.
January 26 - A man who claims to be a doctor poisoned 12 of the 15 employees at a Tokyo bank and looted the money he found. Sadamichi Hirasawa was convicted of the act.
January 30 - Indian pacifist leader Mahatma Gandhi is assassinated.
February 4 - Ceylon (later Sri Lanka) gained independence. King George VI remained king and head of state of Ceylon.
February 10 - The Central Committee of the Communist Party of the Soviet Union in its resolution condemned e.g. Music by Aram Hatchaturyan, Sergei Prokofiev and Dmitry Shostakovich. The measure related to the clean-up of cultural life by Andrei Zhdanov.
February 23 - Soviet Ambassador to Helsinki Grigori Savonenkov presents a letter from Josif Stalin to President J. K. Paasikivi proposing a co-operation and assistance agreement with Finland on the basis of agreements with Hungary and Romania.
February 24 - Communist Party seizes power in Czechoslovakia.
February 27 - Great Britain and Sweden express public concern about the development of relations between Finland and the Soviet Union.
March 5 - President J. K. Paasikivi discusses Stalin's draft treaty with the chairmen of the parliamentary groups. SKDL unreservedly supported the agreement, the SDP and the RKP demanded that Finland be kept out of the great power conflicts, the Agrarian Union, the Coalition Party and the Finnish Progress Party opposed the start of negotiations.
March 9 - The Commander of the Defense Forces, Aarne Sihvo, orders the army on standby in the event of a rumored coup attempt by the Communists.
March 9 - President J. K. Paasikivi sends a positive response to Stalin's invitation to start treaty talks in Moscow.
March 10 - Czechoslovak Foreign Minister Jan Masaryk dies after falling out of his office window. The case was branded suicidal.
March 22 - Finland and the Soviet Union start negotiations on a YYA agreement in Moscow. The Finnish delegation included Prime Minister Mauno Pekkala, Foreign Ministers Carl Enckell and Reinhold Svento, Minister of the Interior Yrjö Leino on behalf of SKDL, Member of Parliament Urho Kekkonen on behalf of the Agrarian Union, Member of Parliament Onni Peltonen on behalf of SDP:
March 24 - Member of Parliament Hertta Kuusinen gave a speech at the Helsinki Fair Hall, in which she was told to recommend "Czech Republic to Finland