Remember, remember the fifth of November
Gunpowder, treason and plot.
I see no reason why gunpowder treason
Should ever be forgot.
Interestingly November 5th has always been a date for celebration, long before the events that unfolded in 1605. But since Guy Fawkes and his accomplices failed to blow-up the houses of parliament, the date is used to mark their failure. It might seem an odd occasion to celebrate, but for 250 years it was the law to remember the failed plot!
The politics of the time are somewhat forgotten in present-day events; now Guy Fawkes Night/Bonfire Night is really just a great excuse for a party!