The quote and poem is sometimes referred to as ‘Please to remember the fifth of November’. It serves as a warning to each new generation that treason will never be forgotten. In England the 5th of November is still commemorated each year with fireworks and bonfires culminating with the burning of effigies of Guy Fawkes (the guy) and people chanting the quote of “Remember remember the 5th of November”.
http://www.rhymes.org.uk/remember_remember_the_5th_november.htm

