Mine is the death of the Princess of Wales. I was 12 at the time- Mum came and woke me and my sister up (much to her annoyance as she had been on a night out the night before) and told us it was important we watched as it was a huge deal. I can still remember sitting there that morning watching the news coverage. The next day mum took us to London for the day and we went to put flowers outside Kensington palace.
I didn't get it at the time but I was the same age as harry and honestly can't imagine having to live through my teens, getting married and having DD without my mum by my side never mind dealing with the pressure of royal life..