Catholics are only required to fast on Ash Wednesday and Good Friday, historically Catholics have (and some still do) fast on Wednesdays, Fridays, and Saturdays that are not feasts or solemnities; also before solemnities such as Pentecost, the Assumption, Christmas, Easter, etc.; and, of course during Advent and Lent especially.
On Ash Wednesday and all the days of Lent after that through Good Friday. However, the fast is not binding except on Ash Wednesday and Good Friday. Also, up to one hour before receiving communion, one should not eat or drink.
Ash Wednesday and all Fridays of Lent are also days of no meat if you are over age 14
of course for Muslims in Ramadan- and the age for some people its 9 but whereas some people believe when your 12
There are only two mandatory fast days for Catholics during Lent - Ash Wednesday and Good Friday. Catholics are urged to also fast on other days in Lent but it is not required.
There have been Catholics since around the year 33 AD, up to and including the present. There are about 1.1 billion Catholics in 2012.
Catholics fast for Lent and so do Greek Orthodox. Some Protestants do to but that seems to be an individual choice.
Catholics must fast on Ash Wednesday and Good Friday under pain of sin. Catholics are encouraged, but not obliged to fast throughout the entire duration of Lent, save on Sundays. On Fridays during Lent, Catholics must abstain from meat.
The period of Lent.
You don't fast during Easter. Catholics, Orthodox and some other Christians fast from meat during Lent: Catholics on Ash Wednesday and every Friday in Lent. Orthodox fast from meat every day during Lent. The Lenten fast ends on Holy Saturday night with the celebration of the Easter Vigil. The purpose of the fast is to discipline the body and focus on the spiritual life.
The obligation to abstain from meat binds Catholics 14 years of age and older. The obligation to fast binds Catholics ages 18 to 59. So, a 59 year old does not eat meat on Fridays (during Lent).
Roman Catholics may not eat meat during a day of fast (Ash Wednesday, the Fridays of Lent, etc.) Otherwise, Catholics have no dietary restrictions.
How fast it runs depends on its width and depth and time of year.
Lent is a time of public penance for Catholics. Catholics between the ages of 18 and 59 should fast on Ash Wednesday and Good Friday. Catholics 14-years and older should not eat meat on Ash Wednesday, Good Friday, and every Friday during Lent.
That depends on what form of Christianity you are talking about. Some Catholics fast during Lent, but most of the other forms never fast.
Catholics are required to fast on Ash Wednesday and Good Friday.
Catholics are required to receive Communion once a year between the liturgical time period surrounding Easter.