I actually think the most interesting aspect here is the pronunciation of “fifth”, which causes people a lot of trouble, because of all those consonants at the end. The f before the th should be silent, and th makes the single sound /θ/. Remember to touch your teeth wiith your tongue.
Most people in England remember this date because of the Gunpowder Plot. Find out about that here:
I remember it, though, because it’s my daughter’s birthday. Happy Birthday Lilian!