When did Islam start

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Check below answers in case you are looking for other related questions:
Who are Banu Qurayzah? What happened to them?
The reason why the Hijri months are called by their well-known names

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Related Answers:
Taking the crescent as a symbol
Why did Mu‘aawiyah (may Allah be pleased with him) appoint his son Yazeed as his successor to the caliphate?
Did the Prophet of Allah Sulaymaan (peace be upon him) force the queen of Saba’ to become Muslim?
Who are Banu Qurayzah? What happened to them?
The reason why the Hijri months are called by their well-known names

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