A Proclamacao da Republica is a Brazilian national holiday observed on November 15th, commemorating the proclamation of the republic on November 15, 1889. On that day, a military coup led by Marshal Deodoro da Fonseca ended the Brazilian Empire and established the Republic of Brazil.
Proclamacao da Republica is November 15th every year.
Marshal Deodoro da Fonseca proclaimed the Republic of Brazil, ending Emperor Pedro II's reign.
Yes, it is a national public holiday in Brazil.