Определить период

...

How many working days in year 1914?

Here is the detail of the calculation:

Because 1914 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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1914.

Here is the list of these 6 public holidays:

1. Jour de l'An : четверг, 1 январь, 1914
2. Vendredi Saint : пятница, 10 апрель, 1914
3. Jeudi de l'Ascension : четверг, 21 май, 1914
4. Fête-Dieu : четверг, 11 июнь, 1914
5. Immaculée Conception : вторник, 8 декабрь, 1914
6. Noël : пятница, 25 декабрь, 1914

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

1. Fête nationale suisse : суббота, 1 август, 1914
2. Assomption : суббота, 15 август, 1914
3. Toussaint : воскресенье, 1 ноябрь, 1914