1917 (one thousand nine hundred and seventeenth) in the Gregorian calendar - a common year, starting on Monday. This is 1917 AD, 917 of the 2nd millennium, 17th year of the 20th century, 7th year of the 2nd decade of the 20th century, 8th year of the 1910s.
January 1 - General Emiliano Chamorro Vargas took over as President of Nicaragua.
January 27 - Military coup in Costa Rica: The Tinoco brothers ousted President Alfredo Gonzalez Flores (Republican Party), and Jose Frederico Tinoco became president.
February 1 - German Empire declares unlimited submarine warfare.
February 5 - Mexico's new constitution promulgated.
February 13 - political strike in Baku.
February 17 - Former Labor Australian Prime Minister William Morris Hughes forms new cabinet as leader of the National Labor Party.
February 28 - Emperor of Austria-Hungary Charles I of Habsburg dismissed the Chief of the General Staff of the Army, Field Marshal, Count Franz Konrad von Götzendorf, and moved him to the post of commander of the Southwestern Front in Tyrol.
March 4 - Woodrow Wilson takes over as President of the United States for a second term
March 8 - the February bourgeois-democratic revolution began in the Russian Empire.
March 10 - The Russian Bureau of the Central Committee of the RSDLP (b) called on the workers and soldiers to actively fight the monarchy.
After negotiations with delegates of the Executive Committee of the Petrograd Soviet of Workers 'and Soldiers' Deputies, the Provisional Committee of the State Duma formed the first composition of the Provisional Government of Russia.
The All-Russian Emperor Nicholas II signed a manifesto of abdication in favor of his brother, Grand Duke Mikhail Alexandrovich.
March 16 - the refusal of the Grand Duke Mikhail Alexandrovich to accept the throne. In his act of renouncing the perception of supreme power, the Grand Duke Mikhail Alexandrovich wrote that he would accept the supreme power only if the people expressed their will through a popular vote through their representatives in the Constituent Assembly.
March 16-17 - election of the Baku Council of Workers' Deputies.
March 18 - a body of the Provisional Government was created in Baku - the Executive Committee of Public Organizations