Meh. This is up there with him saying "fuck". I don't really care if he knows a date off the top of his head - it's a non-issue.

I'm far more concerned about him shitting on the Constitution, turning the military and federal law enforcement on US citizens, metaphorically raping the economy, literally raping women, and his long list of actual crimes he's committed against the US.

He unleashes an actually-impactful scandal on daily basis: let's not get distracted by petty shit.