DuPont Shift Schedule Calculator

Walking through one cycle

Say your 28 days start on a Monday. The opening fortnight's the demanding half — a run of day shifts, a short gap, a run of nights, another short gap, then more days. The exact order varies by site, but the shape doesn't: blocks of work separated by turnarounds too brief to properly reset on. By the middle of week three, you've done the heavy lifting. Then, right on schedule, a run of consecutive days off opens up, and it doesn't close for roughly a week. Not a long weekend bolted onto a normal week. An actual week where the plant just doesn't feature. Day 28 comes round, and Monday you're straight back into the same loop.

That's DuPont, in miniature — a lumpy, front-loaded stretch of work, then one long clean block of rest, forever. It clicks a lot faster watching a full cycle scroll past on a generated calendar than it ever does trying to hold a grid of letters in your head.

Why it's built this way

The 28 days comes down to team maths. A DuPont site runs four teams — usually A, B, C and D — all working the identical sequence of days, nights and rest, each one offset from the next so there's always a team on days and a team on nights. Stack the four offset sequences and they tile perfectly across 28 days, which is how the site stays covered without anyone doing more than their fair share. Shifts run long, the industrial kind, typically twelve hours — days starting around 7am, nights around 7pm — though every site sets its own changeover times.

It traces back to the DuPont chemical company and spread from there into petrochemical, oil-and-gas, paper mills, and other continuous-process manufacturing. These are sites that genuinely can't down tools overnight, and a four-team rotation is about as close as you get to the only workable way to keep the lights on without running people into the ground.

The trade you're actually making

The turnarounds in that opening fortnight are the real cost. Swing from a run of nights straight into a run of days with barely a day to reset, and that "day off" in between is mostly spent asleep while it's light outside, not actually resting. Fair to say that's the bit DuPont workers grumble about most. The payoff is the long week at the back of the cycle — fixed point, every time, so you can book a trip, plan around school holidays, or just guard it as recovery. But only if you've managed sleep through the heavy run beforehand. Let the debt pile up during the front-loaded stretch and you arrive at your week off already wrecked, and you'll burn the first day or two just catching up rather than using the time properly.

Rather never be more than a couple of days from a break? A pattern with rest spread more evenly will probably suit you better — see the related patterns below. DuPont's for people happy to trade a harder fortnight for one big, dependable block of freedom.

Your calendar, generated

Pick DuPont above, choose your team (A, B, C or D — this sets which week your long break falls in, so get it right), and enter the first day of your current 28-day cycle. The full year lays out with the long rest block clearly visible as an unbroken run, bank holidays flagged. Use the date checker for any single date months out, and export the year once it looks right.

In brief

How long is the famous DuPont break? Roughly seven consecutive days off near the end of each 28-day cycle, at the same point every time — not a long weekend bolted onto a normal week, but an actual week where the plant doesn't feature. Because it recurs at a fixed point in every cycle, you can see it coming from a fortnight out and plan around it without ever filling in a leave form.

What's the run before it like? The demanding half of the cycle — day shifts and night shifts mixed together with only short turnarounds between them, leaving little genuine recovery time between shift types. The single day squeezed between a run of nights and a run of days sounds like rest on paper, but in practice it's mostly spent sleeping while it's light outside so you're fit for the next shift.

How do I find my team? Check your rota, contract, or the board at your site, or ask your shift coordinator — most DuPont sites label teams A, B, C and D. It decides which week your long break lands in, so it's worth confirming before relying on the calculator, since the wrong team shows a completely different position in the cycle.

Related Shift Patterns