" SCP-4666 activity occurs exclusively within a period of 12 consecutive nights every year, from the night of December 21-22 to the night of January 1-2; this period is known as SCP-4666’s [ active phase ]. During this phase, in what are termed [ Weissnacht Events ] , SCP-4666 will appear at dwellings in one or multiple locations north of 40°N latitude. In all known Weissnacht Events, these dwellings have shared the following characteristics: isolated rural location, home to a family with at least one child under the age of 8, and situated in an area with snow cover lasting throughout the duration of the event. "