does the puzzle have to do anything with those tree in the night time?
No, the time of day in the forest doesn't matter. You just need to follow an invisible path down from an Orange Tree until you reach a Red Tree. You then go left from the Red Tree and you will encounter the zone with the Harbinger. As long as you line yourself up with the center of both trees you will reach the destination you seek. There are no prerequisites aside from following the path.