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How many working days in year 1928?

Here is the detail of the calculation:

Because 1928 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 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 1928.

Here is the list of these 9 public holidays:

1. Karfreitag : пятница, 6 апрель, 1928
2. Ostermontag : понедельник, 9 апрель, 1928
3. Tag der Arbeit : вторник, 1 май, 1928
4. Christi Himmelfahrt : четверг, 17 май, 1928
5. Pfingstmontag : понедельник, 28 май, 1928
6. Tag der Deutschen Einheit : среда, 3 октябрь, 1928
7. Reformationstag : среда, 31 октябрь, 1928
8. Weihnachtstag : вторник, 25 декабрь, 1928
9. Zweiter Weihnachtsfeiertag : среда, 26 декабрь, 1928

And here is the public holiday falling on a weekend:

1. Neujahrstag : воскресенье, 1 январь, 1928