Answer
**Answer: May 18th.** On this day, Italy commemorates the lives and sacrifices of two renowned anti-mafia magistrates, Giovanni Falcone and Paolo Borsellino, who were brutally assassinated by the Sicilian Mafia in 1992. This annual observance serves as a solemn reminder of their unwavering dedication to upholding justice and fighting organized crime, emphasizing the importance of legality and the rule of law in society.