𝗡𝗮𝘁𝗶𝗼𝗻𝗮𝗹 𝗙𝗹𝗮𝗴 𝗗𝗮𝘆 𝟮𝟬𝟮𝟮 PH National Flag Day in the Philippines is celebrated on May 28. It commemorates the first use of the Philippine flag after the victory in the Battle of Alapan in 1898. The BdNHS Senior Scout participated in the National Flag Day in the Philippines.