Anti-Terrorism Day is observed in India every May 21. This memorial day commemorates the assassination of Rajiv Gandhi, the seventh Prime Minister of India, who was killed by a suicide bomber during his campaign for the 1991 general elections in Sriperumbudur. The attack resulted in the deaths of Gandhi, his assassin, and 25 others. The day serves to urge Indians to strive for peace, unity, and harmony while reminding them of precautionary measures to prevent terrorist attacks. Although it is not a public holiday, its significance lies in honoring the memory of those lost to terrorism and promoting a collective effort against such violence.