On April 15, Hong Kong celebrated National Security Education Day (NSE Day) for the first time in the special administrative region (HKSAR)’s history. The mainland has held a National Security Education Day on April 15 each year since the holiday was designated in a July 2015 National Security Law of the People’s Republic of China (PRC). In Hong Kong, NSE Day was marked by a symposium of events held by the Committee for Safeguarding National Security, a body established by a new national security law implemented last June and led by the city’s chief executive Carrie Lam Cheng Yuet-ngor (China Daily, April 13). The theme of the day was to “Uphold National Security, Safeguard Our Home—Improve Electoral System, Ensure Patriots Administering Hong Kong.”