How many working days in year 2040?
Here is the detail of the calculation:
Because 2040 is a leap year, it has 366 days.
Let's remove 52 saturdays and 53 sundays. It remains 261 days.
Now, let's remove 8 public holidays that do not fall during a weekend and we obtain 253 working days in 2040.
 Here is the list of these 8 public holidays: 
 
 1. Vendredi Saint : пятница, 30 март, 2040 
2. Lundi de Pâques : понедельник, 2 апрель, 2040 
3. Jeudi de l'Ascension : четверг, 10 май, 2040 
4. Lundi de la Pentecôte : понедельник, 21 май, 2040 
5. Fête-Dieu : четверг, 31 май, 2040 
6. Fête nationale suisse : среда, 1 август, 2040 
7. Noël : вторник, 25 декабрь, 2040 
8. Saint Étienne : среда, 26 декабрь, 2040 
And here is the public holiday falling on a weekend:
1. Jour de l'An : воскресенье, 1 январь, 2040