March 17th commemorates the official birth of the Kingdom of Italy in 1861 with a number of events.
The Anniversary of the Unification of Italy was previously celebrated every fifty years – in 1911, 1961 and 2011. Year 2011 marked the 150th anniversary when it was proclaimed as a national holiday on an annual basis. The major representative cities giving value to the national identity and historic values include Naples, Rome, Turin, Genoa, Venice, Florence and Milan.
National Unity Day “Giornata dell’Unità nazionale” was officially approved by parliament by 2012 recognizing the date of the proclamation in Turin in 1861 of March 17th as an annual celebration to consolidate national educational values and citizenship through remembrance.

National Unity Day of Italian Constitution, the anthem, the flag (Italian Parliament, Law n.222 – November 2012)