An Afterfeast is a period of celebration attached to one of the Great Feasts celebrated by the Orthodox Christian and Eastern Catholic Churches (somewhat analogous to what in the West would be called an Octave). Most of these Great Feasts also have a day or more of preparation called a Forefeast (those Feasts that are on the moveable Paschal Cycle do not have Forefeasts). Forefeasts and Afterfeasts will affect the structure of the services during the Canonical Hours. The Forefeasts and Afterfeasts break down as follows: Other Great Feasts that have Afterfeasts (although no Forefeasts) are: