This holiday is always celebrated on 15 March. It is also known as Revolution and Independence Day. In Hungarian, it is called 'Nemzeti ünnep'.
This day marks the anniversary of the start of the 1848 Revolution against the Austrian Empire.
Hungary had been part of the Austrian Empire since the early part of the nineteenth century, though it had operated almost as a separate country; its biggest bond to the empire was a common monarch.
The revolution in 1848 began following discontent with taxation and a desire for freedom of the press, freedom of religion and an independent parliament for Hungary. The desire for independence was also driven by other revolutions across Europe at this time.
The revolution became the the war for independence, which resulted in defeat for the Hungarian revolutionaries in October 1849. Despite the failure of the revolution to deliver independence, the revolution is seen as a key point in Hungary's history and that the efforts of the people at that time should be remembered in this national holiday.
Following the collapse of the Soviet Union in 1989, celebrating Revolution and Independence day has been more open and the day is marked by speeches and performances of traditional Hungarian music.
A custom is for people to wear a cockade (rosette) containing red, white and green ribbons, the colours of the Hungarian flag.