How many working days in year 2039?
Here is the detail of the calculation:
Because 2039 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 7 public holidays that do not fall during a weekend and we obtain 253 working days in 2039.
 Here is the list of these 7 public holidays: 
 
 1. Vendredi Saint : пятница, 8 апрель, 2039 
2. Lundi de Pâques : понедельник, 11 апрель, 2039 
3. Jeudi de l'Ascension : четверг, 19 май, 2039 
4. Lundi de la Pentecôte : понедельник, 30 май, 2039 
5. Fête nationale suisse : понедельник, 1 август, 2039 
6. Toussaint : вторник, 1 ноябрь, 2039 
7. Saint Étienne : понедельник, 26 декабрь, 2039 
And here are the 2 public holidays falling on a weekend:
1. Jour de l'An : суббота, 1 январь, 2039 
2. Noël : воскресенье, 25 декабрь, 2039