Определить период

...

How many working days in year 1960?

Here is the detail of the calculation:

Because 1960 is a leap year, it has 366 days.

Let's remove 53 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 1960.

Here is the list of these 10 public holidays:

1. Capodanno : пятница, 1 январь, 1960
2. Epifania : среда, 6 январь, 1960
3. Lunedì di Pasqua : понедельник, 18 апрель, 1960
4. Anniversario Liberazione : понедельник, 25 апрель, 1960
5. Festa della Repubblica Italia : четверг, 2 июнь, 1960
6. Ferragosto o Assunzione : понедельник, 15 август, 1960
7. Festa di San Gennaro : понедельник, 19 сентябрь, 1960
8. Ognissanti o Tutti i Santi : вторник, 1 ноябрь, 1960
9. Immacolata Concezione : четверг, 8 декабрь, 1960
10. Santo Stefano : понедельник, 26 декабрь, 1960

And here are the 2 public holidays falling on a weekend:

1. Festa del lavoro : воскресенье, 1 май, 1960
2. Santo Natale : воскресенье, 25 декабрь, 1960