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How many working days in year 1984?
Here is the detail of the calculation:
Because 1984 is a leap year, it has 366 days.
Let's remove 52 saturdays and 53 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 1984.
 Here is the list of these 11 public holidays: 
 
 1. Jour de l'An : Monday, 2 January, 1984 
2. Jour de la Sainte Dévote : Friday, 27 January, 1984 
3. Lundi de Pâques : Monday, 23 April, 1984 
4. Fête du Travail : Tuesday, 1 May, 1984 
5. Jeudi de l'Ascension : Thursday, 31 May, 1984 
6. Lundi de la Pentecôte : Monday, 11 June, 1984 
7. Jour de la fête Dieu : Thursday, 21 June, 1984 
8. Fête de l'Assomption : Wednesday, 15 August, 1984 
9. Fête de la Toussaint : Thursday, 1 November, 1984 
10. Fête Nationale : Monday, 19 November, 1984 
11. Jour de Noël : Tuesday, 25 December, 1984 
And here are the 2 public holidays falling on a weekend:
1. Jour de l'An : Sunday, 1 January, 1984 
2. Fête de l'Immaculée Conception : Saturday, 8 December, 1984