Определить период

...

How many working days in year 1901?

Here is the detail of the calculation:

Because 1901 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 1901.

Here is the list of these 9 public holidays:

1. Jour de l'An : вторник, 1 январь, 1901
2. Lundi de Pâques : понедельник, 8 апрель, 1901
3. Fête du Travail : среда, 1 май, 1901
4. Jeudi de l'Ascension : четверг, 16 май, 1901
5. Lundi de la Pentecôte : понедельник, 27 май, 1901
6. Assomption : четверг, 15 август, 1901
7. Toussaint : пятница, 1 ноябрь, 1901
8. Fête de l'Armistice : понедельник, 11 ноябрь, 1901
9. Noël : среда, 25 декабрь, 1901

And here is the public holiday falling on a weekend:

1. Fête Nationale : воскресенье, 21 июль, 1901