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How many working days in year 1905?

Here is the detail of the calculation:

Because 1905 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 253 working days in 1905.

Here is the list of these 7 public holidays:

1. Karfreitag : пятница, 21 апрель, 1905
2. Ostermontag : понедельник, 24 апрель, 1905
3. Tag der Arbeit : понедельник, 1 май, 1905
4. Pfingstmontag : понедельник, 12 июнь, 1905
5. Tag der Deutschen Einheit : вторник, 3 октябрь, 1905
6. Weihnachtstag : понедельник, 25 декабрь, 1905
7. Zweiter Weihnachtsfeiertag : вторник, 26 декабрь, 1905

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

1. Neujahrstag : воскресенье, 1 январь, 1905
2. Heiligabend : воскресенье, 24 декабрь, 1905
3. Silvester : воскресенье, 31 декабрь, 1905