TimeCubby.

A/B Timetable Rotation

Build a dated A/B or custom school rotation. Choose whether a closure pauses the cycle or advances it without holding classes.

Starts with an editable example. Replace the dates and rules with your own.

Your calculation

Inputs stay on this page unless you choose to save them.

Ready when you are

Choose your dates.

Select your counting rules and calculate.

How to use this calculator

Enter a display range, an earlier cycle anchor, comma-separated cycle labels, school weekdays and closures. Choose the closure rule used by your school.

The first label starts on the first selected weekday on or after the anchor. Unselected weekdays never advance the cycle. Closed selected weekdays either pause or consume a position, while the class calendar exports only open dates.

A worked example

An A/B cycle starts Monday November 2, 2026. If Tuesday is closed, Wednesday is B when the cycle pauses, or A when the closed Tuesday advances the cycle.

Can I use more than A and B?

Yes. Use up to ten distinct labels, such as A,B,C,D or Red,Blue,Green. Each label can contain up to twelve characters.

Which calendar and years are supported?

Use Gregorian dates from 1900 through 2100, with results in that range. Daily attendance, office, coverage and chore plans allow up to 366 dates; school cycles, course plans and milestones allow up to 731. Dependency and historical workday calculations scan at most 3,661 dates. Class-session searches allow 366 dates and 200 sessions. Time-zone tools use browser IANA rules and require a choice when local times repeat. Dates and policy rules are entered manually; no employer, retailer, school or local weather policy is inferred. Copy, CSV and printing include the calculation rules; calendar exports appear when the result contains dated events.

What happens to my dates?

Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.