Hmmmm. Is there a similar event/holiday in any of your story 'verses? Whatever seems to gel well for you. If there was a similar event (Insurrection and explosives! Down with the government for we are the 99%! ;-p) then that would be fun to read about but if there is a similar fireworks and bonfire jacket potatoes holiday (with or without "penny for the guy" and burning the guy on the bonfire) then that instead. To be honest I would rather read something that you are comfortable writing - you know your stories/characters/'verses better than I do at this point!