This national holiday is always celebrated on 22 January. It has been a public holiday since 2010.
Known in Spanish as 'Día del Estado Plurinacional', this holiday celebrates the a change in the name of the country and the adoption of a new constitution in 2009.
In 2005, Evo Morales won the Bolivian general election and became the first President to come from the indigenous population. His inauguration was on 22 January 2006.
In 2009, a change to the constitution of Bolivia was promulgated by President Morales, recognising in statute the multi-cultural nature of modern Bolivia.
The new constitution changed the official name of the country to the Plurinational State of Bolivia.
The new constitution was enacted on 22 January 2010, when President Morales was inauguration for a second term as President.
On the same date Morales also signed a decree declaring 22 January as the Plurinational State Foundation Day and a national holiday to be celebrated annually.