Topic guide · updated 2026-08-02
Parenting schedules and the overnight count
Standard custody rotations look similar on paper and differ enormously in practice. This explains what each one does to a week, why support guidelines count nights rather than hours, and how the overnight percentage feeds into a support calculation.
The named rotations — two-two-three, two-two-five-five, three-four-four-three, week on week off, every other weekend — are the schedules courts and lawyers reach for because they are familiar and easy to write into an order.
Four of the five split the year almost exactly evenly. What separates them is not the split at all; it is how often a child changes homes, which ranges from about one handover a week to nearly three.
The overnight count matters beyond the calendar, because it is the figure support guidelines key on in states that account for parenting time.
Why nights and not hours
Guidelines that adjust for parenting time count overnights. The reason is evidentiary rather than philosophical: an overnight is unambiguous and provable from a calendar, whereas an argument about daytime hours rarely resolves. It also means a schedule can be evaluated before it is agreed. Expanding a rotation by one night per fortnight is a concrete change with a computable effect, where 'more time' is not.
What each rotation does to a week
Two-two-three cycles two nights, two nights, then a three-night weekend that alternates, giving both parents part of every week at the cost of frequent exchanges. It suits younger children who do not do well with long gaps. Two-two-five-five fixes each parent's weeknights permanently — the same two nights every week — then alternates five-night stretches. Predictable weekday routines, fewer handovers. Three-four-four-three alternates three- and four-night blocks so nobody goes longer than four nights, and each parent gets a full weekend every other week. Week on, week off has the fewest transitions of any equal schedule, which is why orders using it often add a midweek dinner or call. Every other weekend is the most common unequal arrangement: one parent keeps the weeknights, the other has alternating Friday and Saturday nights, producing roughly fifty-two overnights a year.
The base rotation is not the final count
A real order layers holidays, school breaks and summer on top of the base pattern, and those blocks can move an annual total by a week or more in either direction. That is why a rotation percentage should be treated as the starting shape of a schedule rather than the number. Where a state's guideline has a threshold, the difference between a base count and a final count can be the difference between crossing it and not.
Carrying the count into a support calculation
Once you have an overnight figure, the question is what your state does with it. California builds timeshare into its formula continuously. Many income shares states adjust only past a published threshold. Some do not adjust at all. The state page for your jurisdiction states which rule applies, and the planner hands its count straight across — which is the connection subscription tools charge for and there is no good reason to.
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Usually not. Even where parenting time is equal, most guidelines still produce an order when the parents' incomes differ, because the formula is about the cost of raising a child across two households rather than about time alone. Equal time changes the number in states that adjust for it; it rarely eliminates it.
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