RIYADH: As part of festivities marking Saudi Arabia’s 93rd National Day, the General Directorate of Passports has issued a special stamp, SPA reported. The Saudi National Day is celebrated every September 23 to commemorate King Abdulaziz bin Abdulrahman Al-Sauds unification of the Kingdom. During National Day celebrations, travelers departing and arriving through Saudi Arabia’s international ports are stamped with a National Day stamp on their passports.