it's not confusing, it's just silly, the Iron Age ended over 2000 years ago, so there were just no ages between the birth of Christ and LK-99?
In any case it's a pretty silly contrivance, how about the oil age? or the silicon age? Both of those are likely to remain more impactful than the LK-99 age, in the event that it does turn out to be an ambient temp/pressure superconductor.