Hungary has not only one, but
three national holidays.
The first one is on the 15th of March and it celebrates the revolution against the Hapsburgs in 1848... which was actually a really nice revolution. Completely bloodless, led by writers, poets and progressive politicians and achieving its goals peacefully... Then the whole revolutionary war happened after that, which was considerably more bloody and coated in a fine layer of nationalistic propaganda even today, but hey, when it comes to actual revolutions, France can eat its heart out.
The second one is on October 6th, and it... um... well, it is about remembering the generals and politicians executed after the 1848-49 revolutionary war. It's pretty depressing and does nothing else but fuel the nation's persecution complex.
The final one though is another interesting one: On October the 23rd, we celebrate two national holidays: one in remembrance of the failed 1956 revolution against the Soviet occupation which, in retrospect, was doomed to failure from the beginning, but when viewed through the rosy glasses of the historical textbooks, it becomes a fight between the common man against the powers of evil while other powers are just standing by without lifting a finger, creating both a heroic narrative and adding another layer of persecution complex on the national baggade.
The more interesting part about this day however, is that by pure coincidence it is also the day, (1989.10.23.) when Hungary broke off from the Soviet Union and declared independence, meaning it is also the founding day of the modern Hungarian Republic. It's rare to see history rhyme like that.
These national days are all celebrated with various degrees of reverence, but for me they are jsut days when I don't have to go to work (similarly how I treat religious holidays).
