The 15th of Ramadan holds significant historical importance in Islamic memory, marked by key events that reflect themes of hope, sovereignty, and confrontation. This date commemorates the birth of Hasan ibn Ali, the grandson of the Prophet Muhammad, who emerged as a figure of reform and unity during a time of division within the Muslim community. His legacy is celebrated, particularly for his decision to relinquish the caliphate to maintain peace during the turbulent period known as 'Year of Unity' when he chose reconciliation over power. Moreover, the article discusses the pivotal Battle of Ain Jalut, fought on the 15th of Ramadan, where the Mamluks shattered the Mongol myth of invincibility. This battle was a crucial turning point for the Islamic world, as it came after the fall of Baghdad and the devastation brought by Hulagu Khan. The Mamluks’ victory in this battle not only defended the Islamic territories of Greater Syria and Egypt but also symbolized the resilience of Muslim forces against the Mongol invasion. Finally, the piece touches on the preliminary stages of the conquests in Andalusia, symbolized by the 'Hawk of Quresh.' This reflects a tradition of Islamic expansion and cultural exchange that would shape the history of Spain and the broader region during the Medieval period. The 15th of Ramadan serves as a reminder of the triumphs and sacrifices that have defined Islamic heritage and the ongoing relevance of these narratives in contemporary discourse.