Take That Clown Monkeys!

Standard Units

Depending what age you are, you maybe not be aged in the same units as others...
Babies start off in hours, then days, then weeks, then months, which include sub-units of weeks and days.
A toddlers age is measure in years, with a possibility of fractions at the quarter, half and three-quarter way points.
Depending on the pre-teen, they may eagerly include the halfway point in their measurement of years.
As a teen, that extra precision tends to be dropped... Unless it's the parent talking about their childs' age.
As a young adult, it's a just a very straight forward number.
Mid-life we tend to just mention the decade we belong to, who needs more precise units than that?
Once a senior, we're back to a straight forward number, but that's more for the benefits of discounts.

Why stay standard... I am currently 30 years and 27 days old...