In which Hijri year was the obligation of Fasting (Roza / Sawm) in the month of Ramadan prescribed for Muslims?

Explanation

Fasting during Ramadan was rendered obligatory (Farz) in Shaban of 2nd Hijri (624 AD). The 2nd year of Hijra witnessed pivotal Islamic milestones, including the change of Qibla (from Masjid al-Aqsa to Masjid al-Haram), the prescription of Zakat, and the decisive Battle of Badr.