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How many working days in year 1972?

Here is the detail of the calculation:

Because 1972 is a leap year, it has 366 days.

Let's remove 53 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 1972.

Here is the list of these 7 public holidays:

1. Karfreitag : пятница, 31 март, 1972
2. Ostermontag : понедельник, 3 апрель, 1972
3. Staatsfeiertag : понедельник, 1 май, 1972
4. Pfingstmontag : понедельник, 22 май, 1972
5. Nationalfeiertag : четверг, 26 октябрь, 1972
6. Weihnachten : понедельник, 25 декабрь, 1972
7. Stefanitag : вторник, 26 декабрь, 1972

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

1. Neujahrstag : суббота, 1 январь, 1972
2. Heiliger Abend : воскресенье, 24 декабрь, 1972
3. Silvesters : воскресенье, 31 декабрь, 1972