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How many working days in year 1917?

Here is the detail of the calculation:

Because 1917 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 1917.

Here is the list of these 9 public holidays:

1. Neujahrstag : понедельник, 1 январь, 1917
2. Karfreitag : пятница, 6 апрель, 1917
3. Ostermontag : понедельник, 9 апрель, 1917
4. Tag der Arbeit : вторник, 1 май, 1917
5. Christi Himmelfahrt : четверг, 17 май, 1917
6. Pfingstmontag : понедельник, 28 май, 1917
7. Tag der Deutschen Einheit : среда, 3 октябрь, 1917
8. Weihnachtstag : вторник, 25 декабрь, 1917
9. Zweiter Weihnachtsfeiertag : среда, 26 декабрь, 1917