This thread title is Deleted "Old Events". Essentially, when an "upcoming event" had passed, I was throwing them into the "old events" section at the very bottom of the forum. Remember the avatar of an old man smiling at the bottom? That was it.
The title included something like "to be deleted unless requested to be saved". Nobody asked for any of them to be saved, so I just deleted that section, which acted like a trash can of sorts. I had a setting where they would be automatically purged after 20 days or so anyway.
It saves me a few keystrokes to just delete the events that have already happened.