The ninth month of the Muslim lunar calendar, it is also the holiest month, where Muslims are encouraged to make additional worship. During the day, from dawn to sunset, Muslims are expected to abstain from food, drink and sex absolutely and from lying, anger and backbiting as much as possible. It is also the month, when, according to Muslims, the angel Gabriel would review with Muhammad the placement of the verses of the Qur'an in the correct order. Because the lunar year is 11-12 days shorter than the solar years, some years you have to fast for a long time, and others you don't need to fast as much. Muslims usually invite each other over for the "breaking of the fast", called the Iftar.