With a modern literal meaning of "midnight," the term
witching hour refers to the time of night when creatures such as
witches,
demons, and ghosts are thought to appear and to be at their most powerful and
black magic to be most effective. Adversely, the term devil's hour applies to the hour of 3am or 3:15; the suggestion being that this demonic hour is an inversion of the time at which Christ died at Calvary. The suggestion being that this hour is a mocking of the holy trinity.