Ramzan/Ramadan is a time for Muslims to fast for the sake of God.

During Ramadan, Muslims ask forgiveness for past sins, pray for guidance and help in refraining from everyday evils, and try to purify themselves through self-restraint and good deeds.

Ramadan was the month in which the first verses of the Qur'an were said to be revealed to the Islamic Prophet Muhammad.

Web : http://en.wikipedia.org/wiki/Ramadan