I love it when I remember something that I have not remembered for a long time, probably not even since it actually happened.
Today, I remembered that when I was very young, looking through the RadioTimes, I didn't understand the 3:15pm, 4:25pm format. I knew how to tell the time on an analogue clock, but I could not understand how you could tell whether 3:15pm meant quarter to three or quarter past three. My brother tried to explain but it took a while. I think in the end I saw a 3:45pm or something and put two and two together.