Clay is 18 years old in human years.
As of 5012 AS, Clay is the equivalent of 18 years old. This also applies to the rest of the Dragonets of Destiny, Clay's siblings, and the "False" DoD.
Explanation:
Clay was established to be 6 years old in The Dragonet Prophcecy.
After the timeskip starting with the The Brightest Night epolouge, Clay is presumably 7 years old.
Since 7 years is considered the point of adulthood, it can be treated as equivalent to 18 years.
Therefore, Clay, and all other dragons of his age, are 18 years old when converted to human years.
Conflict: Some of Clay's siblings, most notably Umber and Sora, are treated like teens as young as 14 and attend Jade Mountain Academy despite being adults.
Suggested Retcon/Rewrite: Clay's siblings attending JMA could potentially be rewritten to be his younger half siblings who were adopted into the clutch for whatever reason. This could make them anywhere from 14 to 16 years old as needed.












