The 18th of Ramadan is marked in the historical record as a day of significant transformations. On this day, the Islamic community bid farewell to "The Sword of Allah", Khalid ibn al-Walid, and the city of Kufa pledged allegiance to Hasan ibn Ali during a critical time. This day also saw the dawn and dusk of various states in Morocco and Al-Andalus, serving as a poignant reminder of the fluid nature of history, marked by knowledge, sovereignty, and resistance.

After the martyrdom of Imam Ali ibn Abi Talib, the Islamic community faced a leadership vacuum during a critical period. On the 18th of Ramadan, in the year 40 AH / 661 CE, the people of Kufa pledged allegiance to Hasan ibn Ali for the caliphate, with Qais ibn Saad ibn Ubada being the first to advance for this oath. Hasan's caliphate lasted about six months, during which he showcased great wisdom by choosing to relinquish power to Muawiya ibn Abi Sufyan in order to preserve the lives of Muslims, an event known as "The Year of Unity".

A large consensus among scholars and historians from the Sunni tradition identifies Hasan ibn Ali as the fifth rightly guided caliph. This perspective is underpinned by a narration from Safina, a slave of the Prophet Muhammad, who indicated the importance of Hasan in the restoration of unity between two significant factions within the Muslim community. The 18th of Ramadan thus serves not only as a historical marker but also as a symbol of the complexities of leadership transitions during the formative years of the Islamic state.