"Behaviorally Modern" and the affiliated "Magic Date"

At basic, one might surmise that "behaviorally modern" implies behavior that contemporary human populations can instantly relate to. However, precisely, what does it mean to be "behaviorally modern", as it relates to human prehistory; do the players in the academia use this term in the same context or apply it on the basis of a set scholarly code? For certain, "behaviorally modern" has been a