Remember, remember the Fifth of November,
The Gunpowder Treason and Plot,
I know of no reason
Why the Gunpowder Treason
Should ever be forgot.
If you’re American like me, you probably know that from V for Vendetta rather than from any actual celebration, so please also remember that, unlike what V for Vendetta arguably implied and Anonymous definitely seems to think, Guy Fawkes was NOT fighting against tyranny (and definitely not an anarchist); he just wanted to kill the (Protestant) king and replace him with a Catholic head of state, which would have been very unlikely to lead to greater freedom for the English people at that time.
Guy Fawkes Day is, of course, supposed to celebrate Fawkes’s failure, not his attempt.