How to Read a Custody Schedule: Cycles and Overnights

Custody schedules look cryptic because they are compressed. A name like 2-2-3 is just a run of numbers describing consecutive nights with each parent before a handoff: two nights with parent A, two with parent B, three with A, then the same shape mirrored the next week. Once you find the cycle length, the whole year is that block on repeat.

Most rotations repeat every 7 or 14 days. The 2-2-3 and 3-4-4-3 run on two-week mirrors, 2-2-5-5 on a fixed 14-day loop, week-on-week-off on 14 days with one handoff, and an exact 70/30 needs a 10-day loop that drifts across the weekdays. Long-distance plans skip weekly rotation entirely and build the year from school breaks and summer blocks.

None of these shapes is required by any law. They are conventions that parents, mediators, and courts share as shorthand. An order can adopt one exactly, modify it, or invent something new.

When a schedule meets a support formula, the unit of account is the overnight: where the child sleeps. A Saturday spent together from breakfast to bedtime counts for nothing in most formulas if the child sleeps at the other home. A year has 365 overnights per child, and orders state who holds each one.

The count is not trivia. Florida’s shared-care formula switches on at 73 overnights, Ohio’s automatic 10 percent reduction at 90, North Carolina’s shared-custody worksheet at 123 for each parent, and Illinois’ shared-care math at 146 each. Georgia’s 2026 adjustment and Michigan’s offset use the overnight numbers directly in their equations. A single overnight can move a support calculation, which is why counts belong in the order itself.

To count a rotation honestly, take one full cycle, tally each parent’s nights, and scale to 365. Fifths and holidays complicate real calendars, so a tool that walks actual dates beats mental math.

Schedule names carry percentage labels, and the labels round. The so-called 60/40 week, four nights with one parent and three with the other, is really a 57/43 split: 4 of 7 nights is 57.1 percent. The 80/20 label usually describes alternating three-night weekends, which is 3 of 14 nights, an actual 78.6/21.4.

Rounding is harmless as a nickname and risky in a formula. If your state’s calculation keys on the overnight count, the arithmetic uses the true count, not the label. Every pattern page in our library shows the day-by-day table so the percentage can be checked rather than assumed.

A few terms recur in orders and parenting plans. The exchange or handoff is the transfer between homes, and schedules differ mainly in how many they require: week-on-week-off has one a week, 2-2-3 has six per fortnight. Anchor days are the fixed weekdays a parent always holds, prized because they make activities plannable. A midweek visit is a short school-night stay that shrinks long gaps without changing the overnight count much.

Two more phrases matter at the margins. Right of first refusal is a clause offering the other parent the child before a babysitter when one parent is unavailable, and its hour threshold is negotiated. And a swing day or transition day is the single day a rotation shifts, the usual place plans strain. Exchange logistics, who drives, where, at what time, live in the order’s fine print, not in the pattern name.

Reading an order, then, takes three passes: find the cycle, count the overnights, and read the clauses that override the cycle for holidays, summers, and breaks. The pattern name is only the first of the three.