Определить период

...

How many working days in year 1964?

Here is the detail of the calculation:

Because 1964 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 1964.

Here is the list of these 7 public holidays:

1. Jour de l'An : среда, 1 январь, 1964
2. Vendredi Saint : пятница, 27 март, 1964
3. Lundi de Pâques : понедельник, 30 март, 1964
4. Fête du Travail : пятница, 1 май, 1964
5. Jeudi de l'Ascension : четверг, 7 май, 1964
6. Lundi de la Pentecôte : понедельник, 18 май, 1964
7. Noël : пятница, 25 декабрь, 1964

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

1. Fête nationale suisse : суббота, 1 август, 1964
2. Saint Étienne : суббота, 26 декабрь, 1964