Maturity as has been overemphasized isn't age but the ability to withstand pressures of life and still forge ahead. Age they said is just a number, which makes matured people not to be judged based on the number of years they've clocked.
A young man might be 50 years old and yet isn't matured due to the behaviours he portray and how he handles issues in the society, while a teen of 19 can be more matured than the 50 years old adult.
For me one of the simplest way I judge a matured person is in his or her ability to accept their wrong without sugarcoating it and trying to make sense out of their lies.
Most adult especially the male folks tries to intimate their younger ones both at home and I'm public by not accepting their wrong, instead they'll shift the blame to the younger ones.
Intimidating the younger folks isn't a true sign of maturity but a fear of losing their seniority. Being the senior doesn't make you mature in that family you belong to for your later information.
Accepting your wrong doesn't make you a foolish person, although among your peers it'll but in the eyes of real people, you're the best and everyone wants to emulate you.
When you offend somebody, learn how to apologize and accept that you were wrong at the first instance and now you've corrected your mistakes.
Accepting your wrong presents you as a truthful person and in the future it'll pay off.