[TOGoS]

Okay but that's a pretty long day, isn't it? I'm not sure that's a proper 'riddle', per se.

[defrost]

Like it or not it's been a definitive example of a classic riddle since before it appeared in Oedipus Rex, an Athenian tragedy by Sophocles that was first performed c. 429 BC.

~ https://en.wikipedia.org/wiki/Oedipus_Rex

( spoiler: he loved his mother )