Определить период

...

How many working days in year 2137?

Here is the detail of the calculation:

Because 2137 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 2137.

Here is the list of these 9 public holidays:

1. Jour de l'An : вторник, 1 январь, 2137
2. Lundi de Pâques : понедельник, 8 апрель, 2137
3. Fête du Travail : среда, 1 май, 2137
4. Jeudi de l'Ascension : четверг, 16 май, 2137
5. Lundi de la Pentecôte : понедельник, 27 май, 2137
6. Assomption : четверг, 15 август, 2137
7. Toussaint : пятница, 1 ноябрь, 2137
8. Fête de l'Armistice : понедельник, 11 ноябрь, 2137
9. Noël : среда, 25 декабрь, 2137

And here is the public holiday falling on a weekend:

1. Fête Nationale : воскресенье, 21 июль, 2137