Child custody agreements often include holiday schedules that determine which parent should have the children during which holidays. Some are obvious, like the mother having custody for Mother’s Day and the father for Father’s Day.nOther holidays can and leave one parent with an empty nest on the big day. Many custody agreements will enable one parent to have custody on the holiday during even-numbered years, and when the same holiday falls on an odd-numbered year, the other parent will have custody for the holiday instead.