How many working days in year 2107?
Here is the detail of the calculation:
Because 2107 is not a leap year, it has 365 days.
Let's remove 53 saturdays and 52 sundays. It remains 260 days.
Now, let's remove 5 public holidays that do not fall during a weekend and we obtain 255 working days in 2107.
 Here is the list of these 5 public holidays: 
 
 1. Orthodox Christmas Day : пятница, 7 январь, 2107 
2. National Day : вторник, 15 февраль, 2107 
3. National Day Holiday : среда, 16 февраль, 2107 
4. May Day Holiday : понедельник, 2 май, 2107 
5. Armistice Day : пятница, 11 ноябрь, 2107 
And here are the 3 public holidays falling on a weekend:
1. New Year's Day : суббота, 1 январь, 2107 
2. New Year's Holiday : воскресенье, 2 январь, 2107 
3. May Day : воскресенье, 1 май, 2107