How many working days in year 1968?
Here is the detail of the calculation:
Because 1968 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 253 working days in 1968.
 Here is the list of these 9 public holidays: 
 
 1. Jour de l'An : понедельник, 1 январь, 1968 
2. Lundi de Pâques : понедельник, 15 апрель, 1968 
3. Fête du Travail : среда, 1 май, 1968 
4. Jeudi de l'Ascension : четверг, 23 май, 1968 
5. Lundi de la Pentecôte : понедельник, 3 июнь, 1968 
6. Assomption : четверг, 15 август, 1968 
7. Toussaint : пятница, 1 ноябрь, 1968 
8. Fête de l'Armistice : понедельник, 11 ноябрь, 1968 
9. Noël : среда, 25 декабрь, 1968 
And here is the public holiday falling on a weekend:
1. Fête Nationale : воскресенье, 21 июль, 1968