How firefighters actually work: the schedules explained

Fire crews live on schedules that look bizarre from the outside: full days at the station followed by multiple days home. The logic is simple: emergencies do not keep office hours, and 24-hour coverage with three crews demands long shifts. These are the patterns that run most departments.

A, B and C shifts

Most US departments split personnel into three platoons named A, B and C. The shift calendar is just the sequence in which the three platoons take their 24-hour tours; when someone says "I'm on B shift", they mean their platoon, not a time of day.

24/48: the classic

Work 24 hours, off 48, repeat: a 3-day cycle where each platoon covers every third day. It averages 56 hours a week, the traditional fire service number. The rhythm is predictable and station life fits it well; the cost is that your workday is a full calendar day, birthdays and holidays included, on a rolling basis.

48/96: the newer favourite

Two full days on, four full days off. Same 56-hour average, radically different life: half the commutes, and the 4-day block off feels like a weekly mini-vacation. Departments that switch rarely switch back; the debate is fatigue on the second 24, which busy houses feel keenly. Read call volume before you vote for it.

The Kelly system

Kelly schedules add scheduled extra days off (Kelly days) to pull the long average back toward contract hours. A common form: work every third day on a 9-day 24/48 backbone, then every so often a rostered Kelly day wipes one tour, bringing averages down from 56 toward 48 or lower depending on the contract. "Modified Kelly" simply means the department tuned the interval. If your posting mentions Kelly days, ask for the cycle length and the resulting average hours; that one number describes your life.

Keeping a 3-platoon life organised

Firefighter calendars confuse every scheduling app built for 9-to-5. ShiftAl handles them natively: put in your platoon's cycle once, 24/48, 48/96 or a Kelly variant, and it rolls forward for years, showing which of your kid's weekends you are home, counting your real hours, and waking you only on tour mornings.