Hello there! Thank you for playing!
[SPOILERS]
The left left thing is a red herring, a misdirection for the player, but a useful information for another character.
Focus on the second part of the text: the secret of the third entrance. If you follow this route, you will find the answer to the timechanger stone's first question. (What day is it today?)
[/SPOILERS]
Let me know if you need more help!