Don't they still have Guy Fawkes Day?
Actually they don't. The old prayers specifically for Guy Fawkes day have been removed from the prayerbook. They were pretty pointedly anti-Catholic, and since the Oxford Movement there has been a strong group in the Anglican Church seeking, if not reunion with Rome, at least a thawing of relations.
Funny thing . . . as a former Anglican I still am settling in to my new Catholic parish (haven't even been there a year yet). We were in choir practice, and somebody mentioned Guy Fawkes day. I looked up and grinned and said, "Hey! I get to cheer for the other side now!" About half the folks in the room knew what I was talking about and laughed -- the other half are like, "these nutty Episcopalians, what is she talking about?"