These young people do not remember the 21st night of September

Where is Allee Willis when we need her? I mean, who doesn't remember the 21st night of September?! YouTubers Tim and Fred Williams (and friend), apparently. They claim this is the first time they're hearing Earth, Wind & Fire's 1978 megahit "September." I'll roll with it but — come on — how is that even possible?

Previously: Twins react as they hear Phil Collins' 'In the Air Tonight' for the first time

screengrab via twinsthenewtrend/YouTube