Festival Nights happens during each solstice and the two equinoxes of each year. During the festivals, the boundaries that define where different creatures can enter dissolve, and consequently all of the magical creatures on a preserve are allowed to run free outside of their normal areas. Going outside during a festival night can be hazardous, and certain precautions must be made to ensure the security of those inside of the house. On the festival nights, nightmares take shape and prowl the yard. Ancient entities of supreme evil patrol the darkness in search of prey. The caretaker's quaters, and a few areas like Warren's cabin are safe from the various monsters that live in the preserve. Fablehaven itself has almost fallen twice during Midsummer's Eve. To defend against the mischievous b