Определить период

...

How many working days in year 1975?

Here is the detail of the calculation:

Because 1975 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1975.

Here is the list of these 9 public holidays:

1. Jour de l'An : среда, 1 январь, 1975
2. Lundi de Pâques : понедельник, 31 март, 1975
3. Fête du Travail : четверг, 1 май, 1975
4. Jeudi de l'Ascension : четверг, 8 май, 1975
5. Lundi de la Pentecôte : понедельник, 19 май, 1975
6. Fête Nationale : понедельник, 21 июль, 1975
7. Assomption : пятница, 15 август, 1975
8. Fête de l'Armistice : вторник, 11 ноябрь, 1975
9. Noël : четверг, 25 декабрь, 1975

And here is the public holiday falling on a weekend:

1. Toussaint : суббота, 1 ноябрь, 1975