Define a period

...

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 11 public holidays that do not fall during a weekend and we obtain 251 working days in 1968.

Here is the list of these 11 public holidays:

1. Jour de l'An : Monday, 1 January, 1968
2. Lundi de Pâques : Monday, 15 April, 1968
3. Fête du Travail : Wednesday, 1 May, 1968
4. Jeudi de l'Ascension : Thursday, 23 May, 1968
5. Lundi de la Pentecôte : Monday, 3 June, 1968
6. Jour de la fête Dieu : Thursday, 13 June, 1968
7. Fête de l'Assomption : Thursday, 15 August, 1968
8. Fête de la Toussaint : Friday, 1 November, 1968
9. Fête Nationale : Tuesday, 19 November, 1968
10. Fête de l'Immaculée Conception : Monday, 9 December, 1968
11. Jour de Noël : Wednesday, 25 December, 1968

And here are the 2 public holidays falling on a weekend:

1. Jour de la Sainte Dévote : Saturday, 27 January, 1968
2. Fête de l'Immaculée Conception : Sunday, 8 December, 1968