Day of the Establishment of an Independent Czecho-Slovak State, celebrates the independence of Czechoslovakia from Austria-Hungary in 1918. (Czech Republic and Slovakia)

Public holidays in the Czech Republic are defined by Act No. 245/2000, on national (public) holidays, on other holidays, on significant days and on days off from work. In addition to public holidays, this law also defines other holidays and significant days. Public holidays and other holidays are non-working days, significant days are working days. Public holidays "should remind citizens of the traditions, noble goals and historical twists and turns on which Czech statehood is built".

Czechoslovakia was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland became part of Nazi Germany, while the country lost further territories to Hungary and Poland. Between 1939 and 1945, the state ceased to exist, as Slovakia proclaimed its independence and Carpathian Ruthenia became part of Hungary, while the German Protectorate of Bohemia and Moravia was proclaimed in the remainder of the Czech Lands. In 1939, after the outbreak of World War II, former Czechoslovak President Edvard Beneš formed a government-in-exile and sought recognition from the Allies.

Austria-Hungary, also referred to as the Austro-Hungarian Empire, the Dual Monarchy or the Habsburg Monarchy, was a multi-national constitutional monarchy in Central Europe between 1867 and 1918. A military and diplomatic alliance, it consisted of two sovereign states with a single monarch who was titled both the Emperor of Austria and the King of Hungary. Austria-Hungary constituted the last phase in the constitutional evolution of the Habsburg monarchy: it was formed with the Austro-Hungarian Compromise of 1867 in the aftermath of the Austro-Prussian War, following wars of independence by Hungary in opposition to Habsburg rule. It was dissolved shortly after Hungary terminated the union with Austria in 1918 at the end of World War I.