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How many working days in year 1966?

Here is the detail of the calculation:

Because 1966 is not a leap year, it has 365 days.

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

Now, let's remove 4 public holidays that do not fall during a weekend and we obtain 256 working days in 1966.

Here is the list of these 4 public holidays:

1. Indépendance : вторник, 1 март, 1966
2. Vendredi Saint : пятница, 8 апрель, 1966
3. Jeudi de l'Ascension : четверг, 19 май, 1966
4. Fête nationale suisse : понедельник, 1 август, 1966

And here are the 3 public holidays falling on a weekend:

1. Jour de l'An : суббота, 1 январь, 1966
2. Fête du Travail : воскресенье, 1 май, 1966
3. Noël : воскресенье, 25 декабрь, 1966