I would say that you would only use them when you are writing in the thousands or more other than that u don't use them
C. Giggles, Cause when you giggle, it's usually cause something is funny.
So I don't believe that it is common, though I do believe that many can be commonly misinformed. It's not the event that is to be mistaken, instead it is more common to find a misdated event. Does that make sense? So the title or name of the event is not mistaken for another, but instead I believe the date or the event itself can be misinterpreted. Since, in order to know exactly what happened, you need to be there, and at the same time, there are many different perspectives. If you need further explanation, just let me know.