[ckpwong]

I'm equally annoyed by people (in a non-personal setting) who asks me my birthday (down to the year) and then asks my age. The person asking is almost always some sort of government/healthcare agent (because most other people are not legally allowed to ask birthday in the first place) filling out some administrative form (paper or online).

Any data entry system which cannot eff-ing figure out my age from my yyyy-mm-dd birthday is an idiot, and deserves to have me "oops-I-calculated-it-wrong" my age.