[@Kessir Tarkin] Hey brah.

"After a full days ride he made it to the village"

Okay, you've fully read the first post, yes? Everyone has been hearing the voice at night-- telling them to go to the Hero of Time Festival in Kakariko Village. But the message about visiting the graveyard comes at 7:45 on the morning of the Festival. I'd say everyone manages to gather there and leave around roughly 8:30. He can only be 20 minutes late in order to run into the current crew, so a whole day's journey wouldn't work.

Maybe place him at Castle Town instead? And have it so he heard the voice on the way there, but was late due to traveling time?

[@POOHEAD189]

It's also just occurred to me that there wasn't really any mention of Cal hearing that voice. He definitely would've heard it at the same time as everyone else-- just to be clear. Since you mentioned he heard about everyone gathering in the graveyard through hearsay.