January 1 - An area of more than ten square kilometers was transferred from the municipality of Tyrvää to the town of Vammala. Extensive areas from the municipalities of Nastola and Orimattila were transferred to the city of Lahti.
January 2 - Panamanian President José Antonio Remón Cantera is assassinated.
January 6 - Archbishop Ilmari Salomies inaugurates Olavi Heliövaara, the new bishop of the Diocese of Oulu, at Oulu Cathedral.
January 9 - Hemmo Silvennoinen was the first Finn to win the German-Austrian Hill Week.
January 21 - President J. K. Paasikivi approved a decree on the new Central Criminal Police, with Kosti Vasa, Police Adviser at the Ministry of the Interior, as the first head.
January 23 - The People's Party elects the mayor of Helsinki, Mayor Eero Rydman, as his presidential candidate for the 1956 presidential election.
January 25 - The Soviet Supreme Soviet abolishes the state of war with Germany.
January 25 - President J. K. Paasikivi appoints Rainer von Fieandt, Governor of the United Nordic Bank, as Governor of the Bank of Finland.
January 30 - SDP MP, journalist and rebel Yrjö Kilpeläinen dies. He was replaced by Valdemar Liljeström, Chairman of the Finnish Metalworkers' Union.
February 3 - Czechoslovakia ceases to have a state of war with Germany.
February 8 - Nikolai Bulganin ousted Georgi Malenkov for Soviet rule.
February 9 - China announces transition from "voluntary" to compulsory military service.
February 13 - Israel captures four of the seven scrolls of the Dead Sea.
February 18 - Poland terminates its state of war with Germany.
February 21 - Uolevi Raade, M.Sc. (Eng.), Was appointed President and CEO of Neste Oy. He had served as general manager of the company since 1952.
February 25 - The Jääkäri movement celebrated its 40th anniversary in Turku. Nearly 140 icemen took part in the celebration.
March 1 - Bulgaria terminates its state of war with Germany.
March 1 - The Soviet Union officially announces that Bruno Pontecorvo, an Italian-born nuclear physicist who disappeared in Helsinki in October 1950, was in Moscow. He later moved to work at the Dubna Nuclear Research Center.
March 6 - The first Pirkan Skiing was held. The 87-kilometer-long trail stretched along Hämeenkangas from Niinisalo to Tampere.
March 18 - Pope Pius XII founded the Diocese of Helsinki in the Catholic Church and appointed Gulielmus Cobben, who had been leading the Finnish Catholic Church for 20 years.
March 25 - U.S. Customs seizes 520 copies of Allen Ginsberg's poem The Cry of Obscenity.
April 5 - Winston Churchill resigns as prime minister for health reasons, succeeded by Anthony Eden.
April 11 - A Kashmir Princess passenger plane owned by Air India is destroyed in the South China Sea.
April 18 - Albert Einstein dies.
April 18 - Hungarian Prime Minister Imre Nagy is fired.
April 18 - Bandung Conference begins in Indonesia.
April 24 - At its party meeting, the Coalition Party elected Member of Parliament, Rector Jussi Saukkonen as its chairman and Ambassador Sakari Tuomioja as its presidential candidate.
May 5 - The Federal Republic of Germany became an independent state.
May 9 - Cold War: Federal Republic of Germany joins NATO.
May 14 - Eight Eastern bloc countries sign a defense alliance in Warsaw.
May 14 - A monument to Marshal Mannerheim is unveiled in Montreux, Switzerland.
May 15 - The Austrian Treaty (Österreichischer Staatsvertrag) is signed.
May 24 - The Radio Club of the Finnish Society of Radio Engineering organized the first public television broadcast in Finland, which was broadcast at the Helsinki University of Technology