> “everyone knows what 4 / 6 /89 signifies” This annoyed me quite a bit. No I don’t. Most people probably don’t. It’s the date of Tiananmen Square.
That's like getting annoyed when people refer to 9/11.
9/11 is a bit of a weird case in that the name of the event is also the event itself... that usually does not happen.
Please label your dates folks (except 9/11 I guess...)