Each career fire station had a number of watches (shifts). Full-time career stations have four watches, red, brown, blue and green, rotating on a "four-on four-off" schedule: two 10-hour day shifts, followed by two 14-hour night shifts, followed by four days off. Combination career and volunteer stations may have had a yellow watch, in which career staff work four 10-hour day shifts per calendar week, having one weekday, Saturday and Sunday off. Non-operational staff were "black watch", and work a regular 40-hour week.