1796 (MDCCXCVI, in Roman numerals) was a leap year of the 18th century of the current Gregorian Calendar, of the Age of Christ, and its Sunday letters were C and B (52 weeks), it started on a Friday and ended on a Saturday.
February 29 - Foundation of the National Library of Portugal.
March 2 - Napoleon Bonaparte appointed commander of the Italian Army.
March 9 - Napoleon Bonaparte marries Josephine de Beauharnais.
March 26 - Napoleon Bonaparte takes command of the Italian Army in Nice.
April 10 - Battle of Voltri.
April 12 - Battle of Montenotte.
April 13 - Battle of Millesimo.
April 14 - First Battle of Dego.
April 15 - Second Battle of Dego.
April 21 - Battle of Mondovi.
April 28 - Armistice of Cherasco.
May 10 - Battle of Lodi.
May 14 - Edward Jenner introduced the first vaccine, the "vaccinia" against smallpox.
May 15 - Napoleon Bonaparte occupies Milan.
May 30 - Battle of Borghetto.
June 1 - Tennessee becomes the 16th US state.
June 4 - First Siege of Mantua; was abandoned on the 31st of July.
June 23 - Armistice of Bologna signed between Napoleon Bonaparte and Pope Pius VI.
August 2 - First Battle of Lonato.
August 5 - Second Battle of Lonato. Battle of Castiglione.
August 19 - Treaty of Idelfonso between France and Spain.
September 4 - Battle of Roveredo.
September 8 - Battle of Bassano.
October 8 - Spain declares war on the Kingdom of Great Britain.
November 6 - In Russia, Tsar Paul I ascends to power after the death of his mother, Empress Catherine the Great.
November 15 - Battle of Arcole bridge; lasted until 17 November.
December 3 - Wedding between Ricardo and Miss Light, with Japa and Viajante as witnesses. December 7 - Federalist candidate John Adams, was elected President of the USA by the Electoral College with 71 votes against 68 for Thomas Jefferson.
January 7 - Charlotte of Wales, heir to the crown of the United Kingdom (d. 1817).
January 21 - Terceira Island, Azores, Francisco Ferreira Drumond, author of the Annals of Terceira Island.
March 18 – Jakob Steiner, Swiss mathematician (d. 1863).
May 4 – William Hickling Prescott, American historian.
June 24 - Count of Palikao, French politician (d. 1878).
August 22 - David José Martins or David Canabarro, in Taquari, Rio Grande do Sul. Important General of the War of the Rags.
August 6 – Jonathan Abbott, m. 1868, was a Brazilian physician.
January 1 - Alexandre-Theóphile Vandermonde, French mathematician (b. 1735).
March 30 - Augusta Wilhelmina of Hesse-Darmstadt, Duchess of the Palatinate-Zweibrücken (b. 1765).
May - Sebastião de Abreu Pereira Cirne Peixoto, Portuguese soldier.
July 21 – Robert Burns, Scottish poet (b. 1759).
October 7 - Thomas Reid, philosopher (b. 1710).
November 6 - Catherine the Great, Russian Empress (b.1729).
December 7 - Manoel Lopes Diniz, the Adão do Sertão (b.1709).