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3 weeks on 1 week off schedule calendar (21/7)

Twenty-one days working, then seven days off, repeated: a four-week cycle that spends three quarters of the year at work. That is about 274 shifts and 3,287 hours a year at 12 hours a shift, an average of 63 hours a week. Put your start date in below for your own 2027 calendar.

  • Free, no sign-up
  • Runs in your browser
  • Nothing uploaded or kept

How to use it

  1. Set your start date

    Enter a date from your roster that is the first day of a block, and say which block it is.

  2. Check the year

    Every shift and day off is drawn, with the hours a year, the days off and the weekends you have free.

  3. Print it or add it to your phone

    Download the calendar file, print the year, or copy the link to share it.

Pick a date you know from your roster; the whole year lines up with it.

Shift times and hours

28-day cycle: 21W 7O

Next 14 days

Shifts in 2027

274

Days off

91

of 365

Hours in 2027

3,288

12 h a shift

Average a week

63 h

Weekends fully off

13 of 52

Longest run

21 on

7 off at most

January 2027
MoTuWeThFrSaSu
Friday 1 January: shiftSaturday 2 January: shiftSunday 3 January: shift
Monday 4 January: shiftTuesday 5 January: shiftWednesday 6 January: shiftThursday 7 January: shiftFriday 8 January: shiftSaturday 9 January: shiftSunday 10 January: shift
Monday 11 January: shiftTuesday 12 January: shiftWednesday 13 January: shiftThursday 14 January: shiftFriday 15 January: shiftSaturday 16 January: shiftSunday 17 January: shift
Monday 18 January: shiftTuesday 19 January: shiftWednesday 20 January: shiftThursday 21 January: shiftFriday 22 January: day offSaturday 23 January: day offSunday 24 January: day off
Monday 25 January: day offTuesday 26 January: day offWednesday 27 January: day offThursday 28 January: day offFriday 29 January: shiftSaturday 30 January: shiftSunday 31 January: shift
February 2027
MoTuWeThFrSaSu
Monday 1 February: shiftTuesday 2 February: shiftWednesday 3 February: shiftThursday 4 February: shiftFriday 5 February: shiftSaturday 6 February: shiftSunday 7 February: shift
Monday 8 February: shiftTuesday 9 February: shiftWednesday 10 February: shiftThursday 11 February: shiftFriday 12 February: shiftSaturday 13 February: shiftSunday 14 February: shift
Monday 15 February: shiftTuesday 16 February: shiftWednesday 17 February: shiftThursday 18 February: shiftFriday 19 February: day offSaturday 20 February: day offSunday 21 February: day off
Monday 22 February: day offTuesday 23 February: day offWednesday 24 February: day offThursday 25 February: day offFriday 26 February: shiftSaturday 27 February: shiftSunday 28 February: shift
March 2027
MoTuWeThFrSaSu
Monday 1 March: shiftTuesday 2 March: shiftWednesday 3 March: shiftThursday 4 March: shiftFriday 5 March: shiftSaturday 6 March: shiftSunday 7 March: shift
Monday 8 March: shiftTuesday 9 March: shiftWednesday 10 March: shiftThursday 11 March: shiftFriday 12 March: shiftSaturday 13 March: shiftSunday 14 March: shift
Monday 15 March: shiftTuesday 16 March: shiftWednesday 17 March: shiftThursday 18 March: shiftFriday 19 March: day offSaturday 20 March: day offSunday 21 March: day off
Monday 22 March: day offTuesday 23 March: day offWednesday 24 March: day offThursday 25 March: day offFriday 26 March: shiftSaturday 27 March: shiftSunday 28 March: shift
Monday 29 March: shiftTuesday 30 March: shiftWednesday 31 March: shift
April 2027
MoTuWeThFrSaSu
Thursday 1 April: shiftFriday 2 April: shiftSaturday 3 April: shiftSunday 4 April: shift
Monday 5 April: shiftTuesday 6 April: shiftWednesday 7 April: shiftThursday 8 April: shiftFriday 9 April: shiftSaturday 10 April: shiftSunday 11 April: shift
Monday 12 April: shiftTuesday 13 April: shiftWednesday 14 April: shiftThursday 15 April: shiftFriday 16 April: day offSaturday 17 April: day offSunday 18 April: day off
Monday 19 April: day offTuesday 20 April: day offWednesday 21 April: day offThursday 22 April: day offFriday 23 April: shiftSaturday 24 April: shiftSunday 25 April: shift
Monday 26 April: shiftTuesday 27 April: shiftWednesday 28 April: shiftThursday 29 April: shiftFriday 30 April: shift
May 2027
MoTuWeThFrSaSu
Saturday 1 May: shiftSunday 2 May: shift
Monday 3 May: shiftTuesday 4 May: shiftWednesday 5 May: shiftThursday 6 May: shiftFriday 7 May: shiftSaturday 8 May: shiftSunday 9 May: shift
Monday 10 May: shiftTuesday 11 May: shiftWednesday 12 May: shiftThursday 13 May: shiftFriday 14 May: day offSaturday 15 May: day offSunday 16 May: day off
Monday 17 May: day offTuesday 18 May: day offWednesday 19 May: day offThursday 20 May: day offFriday 21 May: shiftSaturday 22 May: shiftSunday 23 May: shift
Monday 24 May: shiftTuesday 25 May: shiftWednesday 26 May: shiftThursday 27 May: shiftFriday 28 May: shiftSaturday 29 May: shiftSunday 30 May: shift
Monday 31 May: shift
June 2027
MoTuWeThFrSaSu
Tuesday 1 June: shiftWednesday 2 June: shiftThursday 3 June: shiftFriday 4 June: shiftSaturday 5 June: shiftSunday 6 June: shift
Monday 7 June: shiftTuesday 8 June: shiftWednesday 9 June: shiftThursday 10 June: shiftFriday 11 June: day offSaturday 12 June: day offSunday 13 June: day off
Monday 14 June: day offTuesday 15 June: day offWednesday 16 June: day offThursday 17 June: day offFriday 18 June: shiftSaturday 19 June: shiftSunday 20 June: shift
Monday 21 June: shiftTuesday 22 June: shiftWednesday 23 June: shiftThursday 24 June: shiftFriday 25 June: shiftSaturday 26 June: shiftSunday 27 June: shift
Monday 28 June: shiftTuesday 29 June: shiftWednesday 30 June: shift
July 2027
MoTuWeThFrSaSu
Thursday 1 July: shiftFriday 2 July: shiftSaturday 3 July: shiftSunday 4 July: shift
Monday 5 July: shiftTuesday 6 July: shiftWednesday 7 July: shiftThursday 8 July: shiftFriday 9 July: day offSaturday 10 July: day offSunday 11 July: day off
Monday 12 July: day offTuesday 13 July: day offWednesday 14 July: day offThursday 15 July: day offFriday 16 July: shiftSaturday 17 July: shiftSunday 18 July: shift
Monday 19 July: shiftTuesday 20 July: shiftWednesday 21 July: shiftThursday 22 July: shiftFriday 23 July: shiftSaturday 24 July: shiftSunday 25 July: shift
Monday 26 July: shiftTuesday 27 July: shiftWednesday 28 July: shiftThursday 29 July: shiftFriday 30 July: shiftSaturday 31 July: shift
August 2027
MoTuWeThFrSaSu
Sunday 1 August: shift
Monday 2 August: shiftTuesday 3 August: shiftWednesday 4 August: shiftThursday 5 August: shiftFriday 6 August: day offSaturday 7 August: day offSunday 8 August: day off
Monday 9 August: day offTuesday 10 August: day offWednesday 11 August: day offThursday 12 August: day offFriday 13 August: shiftSaturday 14 August: shiftSunday 15 August: shift
Monday 16 August: shiftTuesday 17 August: shiftWednesday 18 August: shiftThursday 19 August: shiftFriday 20 August: shiftSaturday 21 August: shiftSunday 22 August: shift
Monday 23 August: shiftTuesday 24 August: shiftWednesday 25 August: shiftThursday 26 August: shiftFriday 27 August: shiftSaturday 28 August: shiftSunday 29 August: shift
Monday 30 August: shiftTuesday 31 August: shift
September 2027
MoTuWeThFrSaSu
Wednesday 1 September: shiftThursday 2 September: shiftFriday 3 September: day offSaturday 4 September: day offSunday 5 September: day off
Monday 6 September: day offTuesday 7 September: day offWednesday 8 September: day offThursday 9 September: day offFriday 10 September: shiftSaturday 11 September: shiftSunday 12 September: shift
Monday 13 September: shiftTuesday 14 September: shiftWednesday 15 September: shiftThursday 16 September: shiftFriday 17 September: shiftSaturday 18 September: shiftSunday 19 September: shift
Monday 20 September: shiftTuesday 21 September: shiftWednesday 22 September: shiftThursday 23 September: shiftFriday 24 September: shiftSaturday 25 September: shiftSunday 26 September: shift
Monday 27 September: shiftTuesday 28 September: shiftWednesday 29 September: shiftThursday 30 September: shift
October 2027
MoTuWeThFrSaSu
Friday 1 October: day offSaturday 2 October: day offSunday 3 October: day off
Monday 4 October: day offTuesday 5 October: day offWednesday 6 October: day offThursday 7 October: day offFriday 8 October: shiftSaturday 9 October: shiftSunday 10 October: shift
Monday 11 October: shiftTuesday 12 October: shiftWednesday 13 October: shiftThursday 14 October: shiftFriday 15 October: shiftSaturday 16 October: shiftSunday 17 October: shift
Monday 18 October: shiftTuesday 19 October: shiftWednesday 20 October: shiftThursday 21 October: shiftFriday 22 October: shiftSaturday 23 October: shiftSunday 24 October: shift
Monday 25 October: shiftTuesday 26 October: shiftWednesday 27 October: shiftThursday 28 October: shiftFriday 29 October: day offSaturday 30 October: day offSunday 31 October: day off
November 2027
MoTuWeThFrSaSu
Monday 1 November: day offTuesday 2 November: day offWednesday 3 November: day offThursday 4 November: day offFriday 5 November: shiftSaturday 6 November: shiftSunday 7 November: shift
Monday 8 November: shiftTuesday 9 November: shiftWednesday 10 November: shiftThursday 11 November: shiftFriday 12 November: shiftSaturday 13 November: shiftSunday 14 November: shift
Monday 15 November: shiftTuesday 16 November: shiftWednesday 17 November: shiftThursday 18 November: shiftFriday 19 November: shiftSaturday 20 November: shiftSunday 21 November: shift
Monday 22 November: shiftTuesday 23 November: shiftWednesday 24 November: shiftThursday 25 November: shiftFriday 26 November: day offSaturday 27 November: day offSunday 28 November: day off
Monday 29 November: day offTuesday 30 November: day off
December 2027
MoTuWeThFrSaSu
Wednesday 1 December: day offThursday 2 December: day offFriday 3 December: shiftSaturday 4 December: shiftSunday 5 December: shift
Monday 6 December: shiftTuesday 7 December: shiftWednesday 8 December: shiftThursday 9 December: shiftFriday 10 December: shiftSaturday 11 December: shiftSunday 12 December: shift
Monday 13 December: shiftTuesday 14 December: shiftWednesday 15 December: shiftThursday 16 December: shiftFriday 17 December: shiftSaturday 18 December: shiftSunday 19 December: shift
Monday 20 December: shiftTuesday 21 December: shiftWednesday 22 December: shiftThursday 23 December: shiftFriday 24 December: day offSaturday 25 December: day offSunday 26 December: day off
Monday 27 December: day offTuesday 28 December: day offWednesday 29 December: day offThursday 30 December: day offFriday 31 December: shift
  • W shift
  • · day off

Check the result against your roster: employers run these patterns in slightly different ways.

How the 3 weeks on 1 week off pattern works

The 28-day cycle repeats on the same day of the week, so your off week always starts on the same weekday. You work about 39 weeks a year. A team covering every day needs four crews staggered a week apart.

Also searched for as: 21 on 7 off, 21/7 rotation, 3 on 1 off.

The cycle is 28 days long: 21 shifts, 7 days off, and then it starts again.

The blocks of the cycle

BlockWhatDays of the cycle
121 shiftsDays 1 to 21
27 days offDays 22 to 28

The numbers

Cycle length28 days
Shifts in a cycle21 of 28 days
Shifts a yearabout 274
Days off a yearabout 91
Hours a year (at 12 h a shift)about 3,287
Average hours a week63
Longest run of shifts21
Longest break7 days

A year is 365.25 days on average, so the yearly figures are averages; the calendar above counts the exact days of the year you pick.

Good and bad about 3 weeks on 1 week off

In its favour

  • Regular week at home
  • Same weekday every cycle
  • Fewer hand-overs than shorter rotations

Against it

  • Three quarters of the year at work
  • Three weeks in a row
  • Less time at home than half-and-half rotations

Who uses 3 weeks on 1 week off

Used in remote and project work where the aim is to keep one crew on site most of the time with a regular week at home.

Employers run these patterns in slightly different ways, and a union contract or roster can differ from the version here. The grid above is exact for the cycle shown: if your roster differs, choose “My own cycle” in the calendar and type it in.

Other shift patterns

All shift patterns and the cycle builder

Frequently asked questions

How many hours a week is 3 weeks on 1 week off?

On average 63 hours a week, at 12 hours a shift: 21 shifts in every 28-day cycle. The weeks are not all alike, so a single week can hold more or fewer hours than the average. Change the shift length in the calendar and every number follows.

How many days off a year do I get on 3 weeks on 1 week off?

About 91 days off in a 365-day year and about 274 shifts, with a longest run of 21 shifts and a longest break of 7 days. Put your real start date in the calendar for the exact count in your year, including how many weekends are fully off.

How many weeks a year do I work on 3 weeks on 1 week off?

About 39 weeks, which is three quarters of the year: roughly 274 working days and 91 days off in a 365-day year. The calendar gives the exact count for your start date.

Can I put the 3 weeks on 1 week off pattern in Google Calendar or on my phone?

Yes. Pick your start date, press Add to my calendar, and open the .ics file in Google Calendar, Apple Calendar or Outlook. Each shift has a fixed ID, so importing the file again later replaces your shifts instead of adding a second set.

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