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How many working days in year 1963?

Here is the detail of the calculation:

Because 1963 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 1963.

Here is the list of these 9 public holidays:

1. Neujahrstag : вторник, 1 январь, 1963
2. Karfreitag : пятница, 12 апрель, 1963
3. Ostermontag : понедельник, 15 апрель, 1963
4. Staatsfeiertag : среда, 1 май, 1963
5. Pfingstmontag : понедельник, 3 июнь, 1963
6. Heiliger Abend : вторник, 24 декабрь, 1963
7. Weihnachten : среда, 25 декабрь, 1963
8. Stefanitag : четверг, 26 декабрь, 1963
9. Silvesters : вторник, 31 декабрь, 1963

And here is the public holiday falling on a weekend:

1. Nationalfeiertag : суббота, 26 октябрь, 1963