Saudi Founding Day (Arabic: يوم التأسيس السعودي), officially the Founding Day (Arabic: يوم التأسيس), is a public holiday in Saudi Arabia celebrated annually on February 22 to commemorate the enthronement of Muhammad bin Saud as the emir of the oasis town of Diriyah in 1727 following the death of his father Saud al-Muqrin, the eponymous ancestor of the al-Saud family.

In 1744, he forged an alliance with Muhammad bin Abdul Wahhab, a reformist Sunni Islamic scholar who sought asylum following expulsion from his hometown of Uyayna due to his perceived devious teachings.

[1] Ibn Wahhab would later turn out to be the spiritual muse of the embryonic emirate and his teachings serving as an exuberant force for future conquests and expeditions of the Arabian Peninsula by successive imams of the First Saudi State in the name of reviving theological monotheism and eradicating conceived innovative deviant beliefs amongst Muslims.

Ibn Saud would go on to reclaim the territories of his ancestors, launching offensives into Hasa in 1913, Ḥa'il in 1921, Hejaz in 1924, and Yemen in 1934 as part of his unification campaigns and establishing several iterations of the Third Saudi State.

[19] As per Kristin Diwan, senior resident scholar at the Arab Gulf States Institute, said that "Mohammed ibn Abd al-Wahhab is being erased from Saudi history".

[21] Celebrations kicked-off with a night air-show performed by the Saudi Hawks in Jubail whereas members of the armed forces held an event in Riyadh to showcase the country's heritage and tradition.