I went to a local Rite-Aid for cold medicine the other day (not sudafed or anything like that, just the store brand equivalent to day-quil) and they asked me for my whole birthdate. Not just the year to make sure that I am over 17, when I refused to give it to them, the poor clerk didn't know what to do. I told her that there was no reason to get the whole date. I buy similar cold meds all the time and have never been asked that.