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How many working days in year 1957?

Here is the detail of the calculation:

Because 1957 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 1957.

Here is the list of these 9 public holidays:

1. Jour de l'An : вторник, 1 январь, 1957
2. Lundi de Pâques : понедельник, 22 апрель, 1957
3. Fête du Travail : среда, 1 май, 1957
4. Jeudi de l'Ascension : четверг, 30 май, 1957
5. Lundi de la Pentecôte : понедельник, 10 июнь, 1957
6. Assomption : четверг, 15 август, 1957
7. Toussaint : пятница, 1 ноябрь, 1957
8. Fête de l'Armistice : понедельник, 11 ноябрь, 1957
9. Noël : среда, 25 декабрь, 1957

And here is the public holiday falling on a weekend:

1. Fête Nationale : воскресенье, 21 июль, 1957