This is because the month of Shawwal begins, and hence the month of Ramadan ends,
after a confirmed sighting of the new moon, either in Saudi Arabia or locally.
In the month of Shawwal 628, Muhammad ordered his followers to obtain sacrificial animals
and to prepare for a pilgrimage(umrah) to Mecca, saying that God had promised him the fulfillment of this goal in a vision when he was shaving his head after completion of the Hajj.[157] Upon hearing of the approaching 1,400 Muslims, the Quraysh dispatched 200 cavalry to halt them.