Saudi Flag Day is observed in Saudi Arabia every March 11, commemorating the adoption of the national flag in 1937. This official holiday celebrates the historical significance of the flag, which traces its origins back to the Emirate of Diriyah, the first Saudi state, established in 1744. The flag features a deep green color, symbolizing its importance in Islamic culture, and displays the shahada, an Islamic declaration of faith, along with a sword representing justice and military strength. The design of the flag was standardized by a royal decree issued by Ibn Saud in 1937, and the current version was officially adopted in 1973. Saudi Flag Day is one of three non-religious legal holidays in the country, alongside Founding Day and National Day. The flag is treated with great respect, as it cannot be flown at half-staff or used on merchandise, due to the sacred nature of the shahada.