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How many working days in year 2016?
Here is the detail of the calculation:
Because 2016 is a leap year, it has 366 days.
Let's remove 53 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 250 working days in 2016.
 Here is the list of these 11 public holidays: 
 
 1. Jour de l'An : Friday, 1 January, 2016 
2. Jour de la Sainte Dévote : Wednesday, 27 January, 2016 
3. Lundi de Pâques : Monday, 28 March, 2016 
4. Fête du Travail : Monday, 2 May, 2016 
5. Jeudi de l'Ascension : Thursday, 5 May, 2016 
6. Lundi de la Pentecôte : Monday, 16 May, 2016 
7. Jour de la fête Dieu : Thursday, 26 May, 2016 
8. Fête de l'Assomption : Monday, 15 August, 2016 
9. Fête de la Toussaint : Tuesday, 1 November, 2016 
10. Fête de l'Immaculée Conception : Thursday, 8 December, 2016 
11. Jour de Noël : Monday, 26 December, 2016 
And here are the 3 public holidays falling on a weekend:
1. Fête du Travail : Sunday, 1 May, 2016 
2. Fête Nationale : Saturday, 19 November, 2016 
3. Jour de Noël : Sunday, 25 December, 2016