Which Islamic month was called month of migration?

The Islamic month called the "month of migration" is Rabi-ul-Awwal. The pivotal event of the Hijra, the migration of Prophet Muhammad (PBUH) and his companions from Mecca to Medina, commenced in the month of Safar, but their arrival in Medina occurred in Rabi-ul-Awwal. This arrival was a momentous occasion, marking the establishment of the first Islamic state and the beginning of the Islamic calendar, making Rabi-ul-Awwal profoundly significant for the consolidation of the Muslim community and the spread of Islam.

• Muharram is the first month of the Islamic calendar, known for the Battle of Karbala, not the Hijra's arrival.
• Ramzan (Ramadan) is the ninth month, revered for fasting, and is not associated with the migration.
• Rajab is the seventh month, known for the Isra and Mi'raj (Night Journey and Ascension), but not the Hijra.