Aramco Operational Calendar 2025 Pdf. The qur’an, in chapter 10, verse. The hijri calendar in 638 ce, six years after the death of the prophet muhammad, islam’s second caliph, ‘umar, recognized the necessity of a calendar to govern the affairs of muslims.
The hijri calendar in 638 ce, six years after the death of the prophet muhammad, islam’s second caliph, ‘umar, recognized the necessity of a calendar to govern the affairs of muslims. The qur’an, in chapter 10, verse.
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