2080 is full time, 40 hours per week, 52 weeks per year. 2000 considers the 10 national holidays. 1980 is the figure that is being used in the acquisition which I am supporting. I questioned the rationale of using 49.5 weeks (1980/40) as a Person Year because it not only breaks a week in half, it breaks a day in half.What number of hours would you use, as a general matter.f you start with 2,080 hours in a year, you first deduct Holidays. If you go with the ten Federal recognized ones, you are already down to 2,000. Then there's paid time off. That seems to be what many companies refer to and combine annual leave with sick leave (federal terms).