Saying · 10 Muharram, 2 AH
Whoever ate breakfast in the morning, let him not eat anything for the rest of the day. Today is going to be wajib to fast.
~2 AH (from Muharram through Ramadan) · 2 AH
Within the first two years of the Hijrah, the core rituals of Islamic worship were legislated. On the 10th of Muharram, 2 AH, the Prophet ﷺ made the fast of Ashura wajib (obligatory) as a single day's fast, a stepping stone before the obligation of fasting Ramadan was later revealed that same year's Ramadan (Surah al-Baqarah), after which the 10th of Muharram reverted to sunnah status. In that same Ramadan, Zakat al-Fitr was made wajib, and within months Zakat al-Mal (2.5% of wealth) followed. The rulings of salah were also perfected in this period (Zuhr, Asr, Maghrib, and Isha lengthened beyond the two-rak'ah Makkan pattern to four, four, three, and four rak'ahs respectively), along with the laws of taharah, wudu, janabah, and ghusl.
Other events recorded in 2 AH. Their order within the year is not established; use the storyline above for the sequence.
Whoever ate breakfast in the morning, let him not eat anything for the rest of the day. Today is going to be wajib to fast.