As discussed in part three of this four part series, using Christmas Day for the parenting plan's winter break exchange seems reasonable because the parents each have Christmas Day. But this may result in an uneven division of time.
When separating parties have children together a parenting plan designates custody of the children. In Washington, the custodial parent is known as the primary residential parent as he or she is the parent that the children primarily reside with. The parenting plan also designates when each parent has the child during school breaks or school vacations (winter, spring, summer). This post is part three of a four part post on creating a winter break schedule.