In Which Year of Hijrah Was Fasting Enjoined?

In which year was fasting enjoined upon the Muslims?

Praise be to Allah, and blessings and peace be upon the Messenger of Allah:

Fasting the month of Ramadan was enjoined in 2 AH, and the Messenger of Allah (peace and blessings of Allah be upon him) fasted nine Ramadans.

Al-Nawawi (may Allah have mercy on him) said in al-Majmu’ (6/250)”

“The Messenger of Allah (peace and blessings of Allaah be upon him) fasted Ramadan for nine years, because it was enjoined in Sha’ban 2 AH, and the Prophet (peace and blessings of Allaah be upon him) died in Rabi’ al-Awwal 11 AH.”

And Allah knows best.