Hijrah refers to the "migration" of the Prophet Muhammad (PBUH) and his followers from Mecca to Madinah in 622 CE to escape persecution. This event was so pivotal that it marks the beginning of the Islamic lunar calendar (Hijri). Beyond its historical context, Hijrah symbolizes the spiritual journey of leaving behind sin and "Jahiliyyah" (ignorance) to seek a life of righteousness and safety in the service of Allah. It represents the sacrifice of home and wealth for the sake of faith and the establishment of a just community.