How many working days in year 2128?
Here is the detail of the calculation:
Because 2128 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 2128.
 Here is the list of these 7 public holidays: 
 
 1. Jour de l'An : четверг, 1 январь, 2128 
2. Lundi de Pâques : понедельник, 19 апрель, 2128 
3. Jeudi de l'Ascension : четверг, 27 май, 2128 
4. Lundi de la Pentecôte : понедельник, 7 июнь, 2128 
5. Fête Nationale : среда, 21 июль, 2128 
6. Toussaint : понедельник, 1 ноябрь, 2128 
7. Fête de l'Armistice : четверг, 11 ноябрь, 2128 
And here are the 3 public holidays falling on a weekend:
1. Fête du Travail : суббота, 1 май, 2128 
2. Assomption : воскресенье, 15 август, 2128 
3. Noël : суббота, 25 декабрь, 2128