First of all, let me address your question about me knowledge of the current time. When you're made of stone aeons old, you make it your business to know about time. Time is part of your, lets say, "genetic makeup".
As for who has passed? Some. Not many. Some as does gets past get no further than Dungeon Town over there. Some further. They come back with tales to tell. Make the pebbles on the back of your neck stand up.
He gestures behind him with his stone eyebrows as best he can, in the general direction of the settlement in the near distance, beneath the tower.
Thing is, they all had to get past me first. Most of them opted for the riddle. Some tried to climb the walls. One lot even tried to stand on me nose as a means of climbing over me. Brave move, given my nose's proximity to my mouth. Needed salt they did. I do love minerals of any kind.
Some opted to fight my champion 'Boulder'. Big fella. Nice enough in his own way but not prone to acts of compassion or mercy as a general rule. Flaw in his character really. Shame.
So what will it be? I'd love to let you through, but I'm an employee see and it's more than me jobs worth. Particulary because, as you can perhaps ascertain, my very nature and physical attributes tend to lead exclusively to door work and there ain't a lot of it on the go down here. So, climb, fight or riddle?