Sure, Marty McFly Day is interesting and all that, but Oct 25, 2015 marks the 600 year anniversary of the Battle of Agincourt, the occasion for Henry V’s famous St. Crispin’s Day Speech, which, as Shakespeare rendered it around 1599, ends thus:

This story shall the good man teach his son;
And Crispin Crispian shall ne’er go by,
From this day to the ending of the world,
But we in it shall be remembered-
We few, we happy few, we band of brothers;
For he to-day that sheds his blood with me
Shall be my brother; be he ne’er so vile,
This day shall gentle his condition;
And gentlemen in England now-a-bed
Shall think themselves accurs’d they were not here,
And hold their manhoods cheap whiles any speaks
That fought with us upon Saint Crispin’s day.