Average month has 30.4 days, that's 8.7 weekend days/ month for civilians.

However, civilians get to go home at 5 pm, and probably go to bed at 11 pm...so they get 6 hours or so at home each day to do whatever, even on a workday. Most pilots do not get to go home on a workday...he may get home on his last work day, but he probably had to start his commute on his last day off.

So, 6 hours/day x 21.7 workdays/month = 130.4 hours at home on work days = 5.4 extra days at home that a pilot with 8 days off does NOT get...

BTW, most civilian professions that involve working at remote locations have a standard 2 weeks on/two weeks off (oil rigs, etc).