Today is Guy Fawkes Day, the anniversary of the Gunpowder Plot. The tl;dr version is that a bunch of rebels planned to blow up the British Parliament on the day the king was to make a speech their. The assassination plot was foiled when authorities received an anonymous tip. You can read up on it if you aren’t already aware of the full story.
Many people are peripherally away of the Gunpowder Plot because of V for Vendetta, either the comic or the movie. The protagonist, V, wears a Guy Fawkes mask and plans to blow up Parliament to protest the fascist regime controlling Britain. Following the film, the hacktivist group Anonymous took to wearing Guy Fawkes masks.
How do people in your setting commemorate acts of revolution and/or terrorism? Are there controversial figures that are heroes or martyrs to some, and villains to others? Does the world have any legendary figures whose actual history doesn’t align with the idealized popular mythology that has sprung up about them?