If it wasn't a government-mandated day (e.g. Friday is now part of the weekend) then you'd have to ensure days off were split such that there was coverage of th

If it wasn't a government-mandated day (e.g. Friday is now part of the weekend) then you'd have to ensure days off were split such that there was coverage of the whole working week - which is exactly what service industries that need more than 9-5 x 5 days a week availability often do currently.