[8] In 1911, between March and April, the 50th anniversary of the birth of the Kingdom of Italy was celebrated with a series of exhibitions in Rome, Florence and Turin.

[10] The Accademia dei Lincei, under the guidance of Pietro Blaserna, published the work "Cinquant'anni di storia italiana" in three volumes describing the political, economic and civil life history of Italy from 1861 to 1911.

[14] On the occasion of the 150th anniversary on 17 March 2011, celebrations were held throughout Italy and a national holiday was proclaimed with schools, offices and suspended work activities.

Moreover, in order to avoid burdens on public finance and private companies, the juridical and economic effects of the suppressed holiday of 4 November were shifted to that date, or each employee had to deduct a day of leave required by the annual vacation sum.

[15] The celebrations for the 150th anniversary began on 5 May 2010 in Quarto dei Mille, with the participation of the President of the Italian Republic Giorgio Napolitano.

222 of 23 November 2012 concerning the "Rules on the acquisition of knowledge and skills in the field of Citizenship and Constitution, and on the teaching of the national anthem in schools", the institution of the National Unity Day, the Constitution, the anthem, and the flag were approved:[20][21] The Republic recognizes the 17th of March, the date of the proclamation of the unification of Italy in Turin in the year 1861, as "National Unity Day, of the Constitution, of the anthem and of the flag", in order to remember and to promote, in the context of a widespread didactics, the values of citizenship, the foundation of a positive civil coexistence, as well as to reaffirm and consolidate the national identity through remembrance and civic memoryThe celebration of the 160th anniversary on 17 March 2021 took place during the COVID-19 pandemic in Italy, which had resulted in the deaths of more of 100,000 Italians.

[4] The Republic recognizes 17 March, the date of the proclamation in Turin, in the year 1861, of the Unification of Italy, as "Day of National Unity, of the Constitution, of the anthem and of the flag", in order to remember and promote, in the context of widespread teaching, the values of citizenship, the foundation of a positive civil coexistence, as well as to reaffirm and consolidate national identity through remembrance and civic memory.