Yeah I was not clear. My intent was to talking about storing of a birthday vs storing a boolean indicating if the user was the age of majority or a boolean for

Yeah I was not clear. My intent was to talking about storing of a birthday vs storing a boolean indicating if the user was the age of majority or a boolean for weather they were 13+ for COPPA. Storing the value, rather than ephemerally processing it, is a matter of convenience so you do not have to ask your authenticated user to re-input their age/birthday/<are you an adult> all of the time. That said it seems unlikely that a regulator would come down hard on a data processor that stored a date vs storing a boolean value.