User blog comment:SayuriDarling/The Trials of Apollo Official Discussion/@comment-5166047-20151103010559/@comment-1515612-20151104064621

Rick has a ton of continuity errors. One of his biggest ones is where Percy is supposed to be gone for six months between TLH and SoN, but is actually gone for like 8 months apparently.

He could probably just claim that Nico forgot his age or something because of the huge time skip. Also, RR could officially give Nico a birthday since Apollo is the god of prophecy and last time he knew Thalia's birthday.

Also, Silena's eye color changes like 2038402384 3 times.