King Louis XVI was foretold by astrologers from a young age to be particularly cautious on the 21st of each month. Despite his efforts to avoid this day, he consistently found himself in significant crises. On June 21, 1791, Louis XVI attempted to flee the French Revolution but was arrested instead. The following year, on September 21, France abolished the monarchy and established a republic. Finally, on January 21, 1793, Louis XVI was executed. These events seem to validate the prophecy, marking the 21st as his day of misfortune.