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How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 251 working days in 1978.

Here is the list of these 9 public holidays:

1. Lundi de Pâques : понедельник, 27 март, 1978
2. Fête du Travail : понедельник, 1 май, 1978
3. Jeudi de l'Ascension : четверг, 4 май, 1978
4. Lundi de la Pentecôte : понедельник, 15 май, 1978
5. Fête Nationale : пятница, 21 июль, 1978
6. Assomption : вторник, 15 август, 1978
7. Fête de la Communauté française : среда, 27 сентябрь, 1978
8. Toussaint : среда, 1 ноябрь, 1978
9. Noël : понедельник, 25 декабрь, 1978

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

1. Jour de l'An : воскресенье, 1 январь, 1978
2. Fête de l'Armistice : суббота, 11 ноябрь, 1978