Infested-us is a multi-day and complex custom. Here's how it typically goes:
Thursday, December 23: They eldest male child in the home shall awaken his parents just past midnight with the cry, "Good Morning! I gotta puke!" Thus the festivities begin.
Friday, December 24: Raging fever shall be passed from member to member among families. Children and adults alike shall fast and deny themselves food, even in the presence of a great banquet. They shall worship at the alter of the bathroom, crying out to the LORD for salvation.
Saturday, December 25: The youngest male child shall ring in the bells of Christmas with the midnight bawl of "Help! Boogies boogies boogies!" This shall be followed by a great period of sleep-deprivation for the adults, and the consuming of balms, teas and popsicles.
Sunday, December 26: Carnival of the sneezes begins. The gift of lotion-treated facial tissues shall be exchanged.
Monday, December 27: The celebrants shall enter a great darkness, gathering together in the family bed for meditation of their suffering and the sharing of blankets.
Thus endeth Infested-Us.