Why the religious fast for Ramadan, Lent and other holy days

Fasting across religions is practiced for a wide range of reasons that include spiritual purification and self-discipline. Muslims are welcoming the start of Ramadan, a month of fasting, increased worship, heightened charity, good deeds and community. Christians are also fasting during Lent, the 40-day period of penance and prayer ahead of Easter. In Judaism, the holiest day of the Jewish calendar involves a 25-hour fasting period that's coupled with prayers for forgiveness. Fasting is also an important part of Jainism. It is viewed as a way to cleanse one's body, including one's bad karma or actions. In Hinduism, fasting is not an obligation, but a voluntary act of spiritual purification.