The 30 April celebrates the Persian Gulf National Day.

The day marks the anniversary of the expulsion of the Portuguese from the Strait of Hormuz-Persian Gulf, which took place in 1622, and is remembered as an important event by the Iranian people.

The celebration of the day wants to highlight the fact that ancient and historical texts have always defined that stretch of sea "Persian Gulf”, Since the ancient Empire Achaemenid he settled in the territory of modern Iran. The events and manifestations want to underline the historical and cultural continuity for which it was so called.