The answer
On Sundays, the believer lives the resurrected life in Christ Jesus, thus sanctifying the whole week.
The Church devotes Wednesdays and Fridays to fasting in memory of Judas’ betrayal and the crucifixion respectively. The Church calls her children not to be afraid of opponents, traitors, or even of those who would crucify and persecute us, but rather to joyfully consider ourselves as crucified with the Lord of Glory, Jesus our Savior. Fasting on Wednesdays and Fridays may be considered as a preparation for the weekly celebration of the Resurrection (on Sunday).
Fr. Tadros Yacoub Malaty