روز ملی خلیج فارس (National Persian Gulf Day) is celebrated annually on April 30 in Iran. This day commemorates the historical and cultural significance of the Persian Gulf, emphasizing its identity and heritage. It serves as a reminder of the region's importance in Iranian history and its role in international trade and maritime activities. The observance of this day aims to promote awareness about the Persian Gulf's strategic position and to honor the sacrifices made by those who defended its name and integrity. Various events, including cultural programs and educational activities, are organized to celebrate this important occasion.