In the calculation given, Abū Bakr served for a little over two years, ʿUmar for over ten, ʿUthmān for nearly twelve, and ʿAlī for nearly five; al-Ḥasan’s short rule completes the thirty-year period.
Reports differ in exact months and days. The figure therefore serves as a recognized delimitation of the early caliphate, not as a claim that every historical chronology agrees down to the day.
Opening interactive controls...
The Companions’ Disputes, Ijtihād, and the Rightly Guided Caliphate
In the calculation given, Abū Bakr served for a little over two years, ʿUmar for over ten, ʿUthmān for nearly twelve, and ʿAlī for nearly five; al-Ḥasan’s short rule completes the thirty-year period.
Reports differ in exact months and days. The figure therefore serves as a recognized delimitation of the early caliphate, not as a claim that every historical chronology agrees down to the day.