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How many working days in year 1900?

Here is the detail of the calculation:

Because 1900 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 1900.

Here is the list of these 9 public holidays:

1. Jour de l'An : понедельник, 1 январь, 1900
2. Vendredi Saint : пятница, 13 апрель, 1900
3. Fête du Travail : вторник, 1 май, 1900
4. Jeudi de l'Ascension : четверг, 24 май, 1900
5. Fête-Dieu : четверг, 14 июнь, 1900
6. Fête nationale suisse : среда, 1 август, 1900
7. Assomption : среда, 15 август, 1900
8. Toussaint : четверг, 1 ноябрь, 1900
9. Noël : вторник, 25 декабрь, 1900