1917 (MCMXVII) was a common year starting on Monday (dominical letter G) of the Gregorian calendar and a common year starting on Sunday (dominical letter A) of the Julian calendar, the 1917th year of the Common Era (CE) and Anno Domini (AD) designations, the 917th year of the 2nd millennium, the seventeenth year of the 20th century, and the eighth year of the 1910s decade. As of the start of 1917, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localised use until 1918.

Events

Below, events of World War I have the "WWI" prefix.

January

February

March

April

Lenin

May

June

July

August

September

October

Brazilian President Venceslau Brás signs a declaration of war against the Central Powers

November

December

Date unknown

Births

January

February

March

April

May

June

July

August

September

October

November

December

Date unknown

Deaths

January–March

April–June

July–September

October–December

Nobel Prizes