No, Time Cube was a bonkers conspiracy theory by a guy who basically had a stroke and went off the deep end. It was filled with unhinged, repetitive racism and ranting about the education system and government. After the old man died the website went defunct but you can still find tracesb of the insanity. Here's a video about it. https://m.youtube.com/watch?v=H7lWCqbgQnU

Although a quick check just revealed that it has returned, but I think it's a parody. https://www.timecube.net/