In the Roman Catholic Church, Halloween's Christian connection is acknowledged, and Halloween celebrations are common in many Catholic parochial schools in the United States. Many fundamentalist and evangelical churches use "Hell houses" and comic-style tracts in order to make use of Halloween's popularity as an opportunity for evangelism. Others consider Halloween to be completely incompatible with the Christian faith due to its putative origins in the Festival of the Dead celebration. Indeed, even though Eastern Orthodox Christians observe All Hallows' Day on the First Sunday after Pentecost, The Eastern Orthodox Church recommends the observance of Vespers or a Paraklesis on the Western observance of All Hallows' Eve, out of the pastoral need to provide an alternative to popular celebrations.