Whether it's JFK being assassinated or man landing on the moon for the elder generation or the Twin Towers tragedy for those much younger, there are incidents that appear frozen in time as you can instantly be transported back in time to that date and time.
For those now constantly glued to Twitter, Facebook, the Internet and Sky Sports News, the idea that word of mouth would pass on the biggest stories probably seems dreadfully antiquated. Yet that is how things were back on 26 November, 1992 when I was at the University of Essex and certainly more focused on United's striking problems than my Sociology degree.
I'd had an early start in the morning, well early for a student - it was probably only a 10am lecture - and had just made the long walk to the campus when I bumped into one of my flat-mates, a Liverpool fan. He immediately asked me if I'd heard the news but I was totally in the dark.
"United have signed a striker," he revealed. "Guess who it is."
I could hardly conceal my excitement. Alex Ferguson had been in need of a new goalscorer for some time following Dion Dublin's injury and losing out to Blackburn for Alan Shearer. Inevitably, numerous names had been linked in the media and I swiftly enquired if it was David Hirst.
Sheffield Wednesday had gone public with their rejection of a £3.5million bid for their old-fashioned centre-forward, who seemed to have the annoying habit of always scoring against United - something Les Ferdinand also seemed to master. In fact, I remember being so angry when he netted a winner in a match on my first weekend in Colchester that I kicked a wall in frustration and my trainers were permanently stained with paint as a result.