Shift pattern calculators

What is a rotating shift pattern?

A rotating shift pattern is a recurring sequence of work and rest days that covers an operation running outside the standard Monday-to-Friday, 9-to-5 model. Whoever invented your pattern was solving for two things at once: keeping the operation staffed 24/7 (or close to it), and giving staff defined runs of rest. The pattern is the compromise.

The word "rotating" matters. On a fixed shift you do the same thing every working day — permanent nights, say, or always the early. On a rotating pattern the shift you work moves around the clock as the cycle turns: a block of days, then a block of nights, then time off, then back to days. That rotation is what makes these patterns hard to hold in your head, and it's the whole reason a calendar like this one exists. Once you can see the shape laid out across a month, the thing that felt random suddenly has a rhythm.

There are about a dozen patterns that account for the vast majority of rotating shift work in the UK, US, EU, and beyond. They differ in three main ways:

• Cycle length — the number of days before the same person works the same shift again. 6 days at the short end, 28 days at the long.
• Shift length — 8 hours, 10 hours, 12 hours, or compressed variants like 9-hour shifts on a 9/80.
• Coverage model — how many teams are needed to staff the operation around the clock.

Those three levers are linked. Longer shifts mean fewer of them, which is why so many continuous operations have drifted towards 12-hour days — it takes only four teams to cover the whole week instead of the larger headcount an 8-hour rota needs. The trade is that a 12-hour shift is a long day, and the recovery afterwards has to be longer too. None of the patterns below is objectively "best"; each one parks the same fixed amount of difficulty in a slightly different place.

The MyShiftCalendar tool supports the patterns below as presets, plus a custom builder for anything else.

How to find your pattern

If you know your employer's name for the pattern, click through to its page. If you don't, work through these clues:

• 8-day cycle, 12-hour shifts, days alternating with nights? That's 4-on-4-off.
• 14-day cycle, blocks of 2-2-3? That's 2-2-3 Pitman / Panama.
• A 28-day cycle with a 7-day off block? That's DuPont.
• A 21-day cycle with 8-hour shifts in a 2-2-3 sub-pattern? That's Continental.
• 12-day cycle, 12-hour shifts, 3 on then 3 off? That's 3-on-3-off.
• 6-day cycle, day-only, 4 on then 2 off? That's 4-on-2-off.
• 5-team rota with every other weekend off? That's EOWEO / Kelly.
• 9 working days across a fortnight with every other Friday off? That's 9/80.
• None of the above? Use the custom pattern builder and enter your real cycle as D/N/O.

One word of warning when you're identifying your own rota: count a full cycle, not just the first week. Plenty of patterns look identical for the first few days and only diverge later. A 4-on-4-off and a 3-on-3-off both start with a run of long shifts and then some time off — the difference only shows up when you track where the same shift lands again. The quickest honest test is to find two dates, weeks apart, where you worked the exact same shift starting at the exact same time, count the days between them, and check that the gap divides cleanly. That gap is your cycle length, and it's the single most useful number you can know about your job.

Fast-rotating or slow-rotating — which one are you on?

This is the distinction that actually changes how your week feels, and it's the one most people have never had named for them. It's about how quickly you move between days and nights.

A fast-rotating pattern switches you between day and night shifts within a single short cycle — you might do a couple of days, a couple of nights, and then rest, all inside a fortnight. 2-2-3 and continental rotas tend to work this way. The thinking behind it is that your body never fully commits to being a night-shift body, so you never get deeply jet-lagged in one direction; the flip side is that you're constantly half-adjusting and rarely fully sharp on either end.

A slow-rotating pattern keeps you on one type of shift for a longer stretch before flipping — a solid block of days, then later a solid block of nights. 4-on-4-off, run with a long sequence of nights before it switches, sits at this end. Here you get a proper chance to settle into nights and sleep through the day, but the changeover at each end is a genuine reset that can knock you sideways for a day or two.

There's no winning answer, and you usually don't get a vote anyway. But it's worth knowing which camp you're in, because it tells you where to spend your effort. On a fast rotation, protect the short sleep windows fiercely — you don't have time to bank rest. On a slow rotation, plan your social life around the changeover days and treat the first night back and the first day off as recovery, not as a chance to catch up on everything.

Days, nights, and the bit nobody warns you about

On paper a shift is a shift. In practice the night side of any rotating pattern carries most of the weight. A run of nights eats into the part of life that happens in daylight — the school run, the appointments, the friends who keep normal hours — and the sleep you get during the day is rarely as deep as the sleep you'd get at night, no matter how good your blackout blinds are.

When you look at your pattern on the calendar, don't just count working days against rest days. Look at where the nights cluster, and look at what comes straight after them. The genuinely hard spot in most rotas isn't the work itself — it's the first "day off" after a block of nights, which you'll mostly spend asleep and which therefore isn't really a day off at all. Knowing that in advance is half the battle. It stops you scheduling something important into a slot you were always going to sleep through, and it lets you tell the people in your life when you're actually available rather than just nominally off. For more on the recovery side, the Shift Work and Sleep guide goes deeper.

Cycle length, at a glance

Why cycle length quietly runs your life

The cycle length in that table looks like a technical detail. It isn't — it's the number that decides whether your weekends and your patterns ever line up with anyone else's. A short cycle that divides evenly into a week, like a 6 or 14-day cycle, repeats against the calendar in a tidy way: the same days of the week tend to fall in the same place each time, so you can roughly predict which Saturdays you'll have for months ahead. A cycle that doesn't divide into seven — a 21-day or 28-day pattern — drifts. Your days off march steadily around the week, so a given weekend off only comes round occasionally, and you can't assume any fixed weekday is "yours".

That drift is the thing people underestimate when they take a job. A long rotating cycle can be brilliant for getting big blocks of consecutive rest — a 28-day pattern often hands you a stretch of days off that a 9-to-5 worker would have to book as annual leave. But it also means your free time lands on Tuesdays and Wednesdays as often as it does on weekends, which is wonderful for quiet shops and empty trails and hopeless for anything that runs to a normal week. Before you commit to a pattern, put it on the calendar and look at a full year, not a fortnight. The first two weeks of any rota look fine; it's months three and four, when birthdays and weddings and the kids' fixtures start colliding with night blocks, where the real shape of the pattern shows itself.

This is exactly what the calculators are for. Pick your pattern, set your start date, and the tool lays out twelve months so you can see the collisions before they happen rather than discovering them one diary clash at a time.

Choosing a pattern, and coping with the one you've got

Most readers here don't get to choose their pattern — it comes with the job, and the honest task is making peace with it. But some of you are weighing up a new role, comparing two rotas, or sitting on a team that's being consulted about a change, and for you the choice is real. A few things worth being honest with yourself about:

• Be truthful about whether you're a lark or an owl. If early starts wreck you, a pattern heavy on 6am days will grind you down no matter how good the days off look. If you cope badly with nights, a fast rotation that keeps flinging you onto them is going to be a long haul.
• Count the consecutive nights, not just the total. Four nights in a row is a different animal to two-and-two. The long unbroken night blocks are where fatigue accumulates, so that's the number to scrutinise.
• Think about who else is in your week. A partner on opposite shifts and a long drifting cycle can mean you barely overlap. The same pattern alongside someone with a flexible week can be a gift.
• Match the rest to the work. Long shifts need long recovery. A pattern that pairs 12-hour days with only a single day off between blocks looks efficient on paper and feels relentless in the body.

If you're already on a pattern and stuck with it, the coping advice is duller but more useful: make it visible. A rota you can see a month ahead is a rota you can plan around, and a rota you can plan around stops feeling like something being done to you. Keep your sleep windows sacred, especially the daytime ones, and tell the people close to you which days are genuinely free and which are catch-up-on-sleep days dressed as days off. If you want a structured walk through the trade-offs before you decide, the Which Shift Pattern Is Right for Me? guide compares the common rotas side by side.

Where to go from here

• You know your pattern: click the card below and use the calculator to lay out your year.
• You don't know your pattern: use the custom builder — enter your actual rota as a sequence of D (day), N (night), and O (off), and the calendar fills in.
• You want help choosing or comparing: see Which Shift Pattern Is Right for Me?
• You're trying to understand the health and safety side: start with Fatigue, Safety and Shift Work and Shift Work and Sleep.

A word on names

Pattern names are not standardised. "Panama" and "2-2-3" and "Pitman" describe the same shape. "Continental" describes one shape in European manufacturing and a different shape in US transit. "DuPont" comes from the chemical company that introduced it in the 1950s — and other companies running the same 28-day shape still call it DuPont because the name stuck. If your employer's name for a pattern doesn't appear here, look at the structure: cycle length, shift length, and how rest days are distributed. The structure is the pattern; the name is just a label.