| The Hijri calendar was officially created during the reign of Khalifa Umar ibn al-Khattab. The Prophet’s migration or hijra in 622AD marks the beginning of the Hijri year calendar and gives the calendar its name. |
| The Hijri calendar was officially created during the reign of Khalifa Umar ibn al-Khattab. The Prophet’s migration or hijra in 622AD marks the beginning of the Hijri year calendar and gives the calendar its name. |