As said above,it's better to check with employer.
Because in my place,outside UK we do have calendar days leave and what does it mean is that your leave includes days off as well and not just working days(shifts)... As it is per calendar and not your shift pattern.We have 28+10 additional leave days in total. So, 38 days of vacation per year. I can only dream on about 58 days or 12 weeks off a year as said above
