Four 12-hour day shifts, four days off, four night shifts, and four more days off. Align one known shift below to generate your calendar and find the strongest PTO bridges.
16-day cycle4 days · 4 off · 4 nights · 4 off
Preparing your local calendar…
Cycle length16 days
Work shifts8
Hours per cycle96
Average weekly hours42
Longest work block4 days
Longest natural break4 days
Exact preset
How the 4 on / 4 off cycle is mapped
Time Off Map treats the date on which a shift begins as its service date. Your selected known work date is matched to one position in the repeating sequence. Dates before and after that anchor are calculated in both directions, including leap days.
1Day shift12h
2Day shift12h
3Day shift12h
4Day shift12h
5Off—
6Off—
7Off—
8Off—
9Night shift12h
10Night shift12h
11Night shift12h
12Night shift12h
13Off—
14Off—
15Off—
16Off—
Before relying on the calendar
This preset alternates four 12-hour day shifts with four 12-hour night shifts.
Fixed-shift 4-on/4-off rosters can be represented later with a custom cycle.
Common questions
4 on / 4 off schedule questions
Can one known work date identify my entire calendar?
Only when you also identify where that date sits in the repeating cycle. Schedules with several work positions are ambiguous otherwise, so Time Off Map asks you to choose the matching cycle day instead of silently guessing.
Does a holiday automatically remove my shift?
No. Rotating operations frequently continue through holidays. Holidays are informational unless you deliberately turn on the setting that treats U.S. federal holidays as non-working days.
Why might my employer’s 4 on / 4 off schedule differ?
Schedule names are not universal standards. Relief times, fixed versus rotating shifts, Kelly or debit days, crew phases, and local agreements can change the sequence. Compare the visible preset with your roster before using the result.