DuPont Schedule Calendar

The DuPont schedule is a 28-day cycle of 12-hour shifts: four nights, three off, three days, one off, three nights, three off, four days, then seven consecutive days off. That full week off at the end is what people either love or hate about it.

About the DuPont schedule

The DuPont schedule is a 28-day cycle of 12-hour shifts: four nights, three off, three days, one off, three nights, three off, four days, then seven consecutive days off. That full week off at the end is what people either love or hate about it.

Who works it: Widely used in chemical plants, refineries, paper mills and other continuous-operation industrial sites.

Cycle length
28 days
Shift length
12 hours
Crews
4
Longest break
7 consecutive days off
Nights per cycle
7

Common questions

What does “cycle start date” mean?

The first day your crew works at the beginning of the rotation. If you're not sure, pick any day you know you were on shift and adjust it until the calendar matches a month you remember.

Can I change the colours?

Yes. The swatches under the pattern picker set a colour per crew or shift — A green, B blue and C red to start with. Change one and it stays that way in your browser next time. Every day also carries its shift code, so the calendar still makes sense printed in black and white or read by someone who is colour blind.

How do I get this on my phone?

Click Download .ics and open the file. iPhone and Android will both offer to add it to your calendar, with every working day as an all-day entry.

Is it free?

Yes, and there's no account to make. The calendar is built in your browser and nothing you generate is uploaded or kept — the site never learns anything about you.