30th June 350, Nepotianus, who had a sore bottom, was killed by Magnentius, played by Ian Mckellen, opposite Patrick Stewart.
Nepotianus, get some cream to rub on that, became a usurper and then Emperor for a staggering 28 days, but then suffered a humiliating defeat when Magneto stormed into town ahead of an army of mutants to claim the crown.
30th June 1559, King Henry II of France decided to do a bit of jousting. I've got a bad feeling about this.
He did pretty well in the opening rounds, but then came up against a fellow jouster Gabriel de Montgomery. And, not taking into account that he was fighting the King, Gabriel wounded Henry and then Henry died.
Everyone was shocked that the king didn't win, and that he was mortally injured, no more so than Henry himself.
Henry's last words were, "You little bast...."
30th June 1934, Adolf Hitler proved way before the start of World War 2 what a complete and utter git he was by eliminating most of his political rivals in Germany.
It is known as The Night of the Long Knives, not because the blades were knives and really long, but because the knives were blades and not short.
Not his fault, Hitler was just going through a stabby phase in his life. Soon to move onto a blow up everyone phase so he skip to the King of the Universe phase.
His phases ended in 1945 with the obligatory shoot-himself-in-the-head-phase. Yay!
The famous number is 999, the number of the head-standing devil. Since it's introduction, other countries have spawned emergency numbers, including the United States and the 911 number.
The 999 emergency number in the UK handles over half a million calls every year, from "How long do you cook a turkey?" to the more serious, "My laptop is broken, can you give me a lift to the shops to get it fixed."*
*Both real 999 emergency calls. I didn't make that up. Seriously.