Wednesday fasting is to remember the betrayal of Jesus by Judas. Friday fasting to remember the Crucifixion. And of course there's fasting periods as well as

Wednesday fasting is to remember the betrayal of Jesus by Judas. Friday fasting to remember the Crucifixion. And of course there's fasting periods as well as weeks you don't fast at all. Monastics also fast an extra day of the week (Mondays), in addition to eating a more restrictive diet in general.