By revisiting the phrase As it is for the good of everyone, and general happiness of the nation, I m ready - tell people that I am staying, that consecrated the Fico Day, this work aims to: highlight the role of the prince regent D. Pedro de Alcântara as protagonist in this event among the political forces in both kingdoms; identify changes in the concepts of People, Nation, Citizen, Sovereignty and Happiness as a result of the clashes between the absolutist conceptions of the State and those of the Constitutionalism, and critically dialogue with the historiography that portrays the Fico Day as a starting point for independence revolution of Brazil achieved in the September 7, 1822., once D. Pedro intended to avoid the risk of independence and to preserve the union of the Portuguese Empire, ensuring the authority of the Braganças. To that end, this dissertation traces a short biography of D. Pedro, analyzes two of the main newspapers of the period Revérbero Constitucional Fluminense and A Malagueta; and highlights the correspondence between the prince and his father, D. João, since the end of December 1821 until January 9, 1822, the Fico Day.