The Argentina Bicentennial (Spanish: bicentenario argentino) was a series of ceremonies, festivals, and observances celebrated on May 25, 2010 and throughout the year. They commemorated the 200th anniversary of the May Revolution, a sequence of historical events that led to the Viceroy Baltasar Hidalgo de Cisneros being ousted from office and replaced with the Primera Junta, the first national government.
Bicentennial celebrations began on Friday, May 21 in Buenos Aires, with millions of people in attendance, making them the biggest outdoor festivities Argentina had seen since it celebrated its return to democratic rule after seven years of military dictatorship in 1983.
Celebrations for the bicentennial started early in 2010 and continued through the year. These events were not related solely to the May Revolution, but also to many factors pertaining to the history and culture of Argentina.
It started on January 20 with the Cosquín Festival, a yearly folk music event which lasts for 12 days. The armies of Argentina and Chile recreated the crossing of the Andes, led in 1817 by José de San Martín, Bernardo O'Higgins, and the Army of the Andes, on January 28. Many historical events of Argentina were performed on a stage in Mar del Plata on February 10, with more than 600 actors, and an audience of more than 100,000 people.
At the beginning of May, President Cristina Fernández de Kirchner signed a decree declaring May 24 a holiday, but only during 2010.