I'm basically asking about the most notable 24 hours in human history.
It's an interesting question, because the actual detonation was just going through the motions of something that had been built up to for years. And if no nuclear holocaust ever happens, then nuclear weapons will seem less important. But obviously, the Sword of Damocles is very important even if it doesn't fall on you.
Restarted? What do you mean? That's the day the universe started for the very first time. The molten Earth cooled to livable temperatures and the very next moment life began, humanity evolved, and Russia invaded Ukraine.
Probably one of those mass-death events millions of years ago. Outside human history, but whatever.
True, the Chicxulub impact 66 million years ago might be the most horrific single event to have ever happened in the entire history of Earth. It directly caused the extinction of 75% of all plant and animal species on this planet.
This video puts the horror into perspective by demonstrating the effects of the impact in real time if the same asteroid were to hit Earth now: https://www.youtube.com/watch?v=ya3w1bvaxaQ
Supposedly the Athenians defeated the Persians at Salamis on the same day that the Syracusans defeated the Carthaginians at Himera.
Trying to measure time is a fool's errand. My proof is that 2016 is both last year and 20 years ago.
setting down a mark on my calendar for Wednesday, May 14, 2025
The day Temujin took the name Genghis Khan certainly shook up the world.