Fasting, is abstaining from eating, drinking and coitus from daybreak to sunset as a devotional ritual. Allah, the Almighty Says in the Noble Quran (what means):

　　 [Imam Al-Bukhari]

　　: "I am fasting." [Imam Al-Bukhari] By this, as though the fasting person says: "It is because I am fasting, I do not return your abuses." The offender at that point may feel embarrassed, and desist.

　　[Quran 2:187].That is why the fasting Muslim should eat at the time of sunset known as Iftar (break fast) and just before dawn Suhoor (the pre-dawn meal) because continuous fasting (day and night) is forbidden in Sharee'ah (Islamic law).

　　[Quran 2:187]. In this way, the Muslim is educated about complete servitude to Allah, the Most High, in such a way that when his Lord commands, he complies. It is, therefore, not simply a matter of personal taste, whim and disposition, but a matter of obedience to Allah and implementation of His Commands.