Определить период

...

How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1985.

Here is the list of these 10 public holidays:

1. Neujahrstag : вторник, 1 январь, 1985
2. Karfreitag : пятница, 5 апрель, 1985
3. Ostermontag : понедельник, 8 апрель, 1985
4. Tag der Arbeit : среда, 1 май, 1985
5. Christi Himmelfahrt : четверг, 16 май, 1985
6. Pfingstmontag : понедельник, 27 май, 1985
7. Tag der Deutschen Einheit : четверг, 3 октябрь, 1985
8. Reformationstag : четверг, 31 октябрь, 1985
9. Weihnachtstag : среда, 25 декабрь, 1985
10. Zweiter Weihnachtsfeiertag : четверг, 26 декабрь, 1985

And here is the public holiday falling on a weekend:

1. Heilige Drei Könige : воскресенье, 6 январь, 1985