How many working days in year 2018?
Here is the detail of the calculation:
Because 2018 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 251 working days in 2018.
 Here is the list of these 10 public holidays: 
 
 1. Jour de l'An : понедельник, 1 январь, 2018 
2. Lundi de Pâques : понедельник, 2 апрель, 2018 
3. Fête du Travail : вторник, 1 май, 2018 
4. Jeudi de l'Ascension : четверг, 10 май, 2018 
5. Lundi de la Pentecôte : понедельник, 21 май, 2018 
6. Jour de la fête Dieu : четверг, 31 май, 2018 
7. Fête de l'Assomption : среда, 15 август, 2018 
8. Fête de la Toussaint : четверг, 1 ноябрь, 2018 
9. Fête Nationale : понедельник, 19 ноябрь, 2018 
10. Jour de Noël : вторник, 25 декабрь, 2018 
And here are the 2 public holidays falling on a weekend:
1. Jour de la Sainte Dévote : суббота, 27 январь, 2018 
2. Fête de l'Immaculée Conception : суббота, 8 декабрь, 2018