On the fifth day of the month of Shawwal 1319 AH, corresponding to the fifteenth of the month of January 1902 enables King Ibn Saud of recovery Riyadh.
This historic event marks a major turning point in the history of the area because of it has led to the modern Saudi state was able to unify most of the Arabian Peninsula, parts, and achieve civilized achievements and wide in various fields point.
And saw the seventh day of the tenth month of May in 1351 AH, corresponding to the nineteenth of the month of September, 1932, the issuance of a royal decree announcing the unification of the country and renamed (Saudi Arabia) from Thursday 21 May in 1351 AH / 23rd September 1932 (the first of the balance ) this culminated in the Declaration of King Abdul Aziz's efforts to unify the country and the establishment of a solid state based on the application of the provisions of the Koran and the Sunna, and this announcement has been established in Saudi Arabia, which has become a great nation in its message and its achievements and regional standing and international, and select after that first corresponding to the September 23 balance to become the National day of the Kingdom.