Do you have a good query for formatting duration (or age) in Years, Months, Days?

So often in my world, I am asked to find out who was the youngest or oldest to achieve something, or how long has it been since something has been achieved in a span of that range. I have a function that will do it, but I'd be interested to see how others have done it.

Of course I know that not all months have 30 days, so saying that someone is 16 years, 8 months, and 7 days old could be equivalent to 16 years, 8 months, and 10 days if months with 31 and 28 days are involved in the calculation. You also cannot just assume that a month is 30 days in your calculation since you could end up with 16 years, 12 months, and 4 days which would immediately look ridiculous and completely destroy your credibility. Number of days is the truest measure for comparison, but telling someone that the youngest was 6095 days old has no meaning to most people.

Anyone out there got a good method for YMD?