Apologizing to your parents feels weird. Do it anyway. They’ve been waiting since you were twelve.

Apologizing upward feels strange because the roles usually run the other way. Parents are the people who corrected you, which makes reversing it feel like breaking a rule, and the awkwardness is generally enough to stop anyone from trying. On their side it is rarely awkward at all. Being spoken to as an equal by your own child tends to land somewhere deep.

Say one specific thing you regret, with no joke and no list of their faults attached. Keep it short, since length is where these turn into arguments. Let whatever they do with it be theirs.