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How many working days in year 1977?

Here is the detail of the calculation:

Because 1977 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 sundays. It remains 260 days.

Now, let's remove 8 public holidays that do not fall during a weekend and we obtain 252 working days in 1977.

Here is the list of these 8 public holidays:

1. Epifania : четверг, 6 январь, 1977
2. Lunedì di Pasqua : понедельник, 11 апрель, 1977
3. Anniversario Liberazione : понедельник, 25 апрель, 1977
4. Festa della Repubblica Italia : четверг, 2 июнь, 1977
5. Ferragosto o Assunzione : понедельник, 15 август, 1977
6. Ognissanti o Tutti i Santi : вторник, 1 ноябрь, 1977
7. Immacolata Concezione : четверг, 8 декабрь, 1977
8. Santo Stefano : понедельник, 26 декабрь, 1977

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

1. Capodanno : суббота, 1 январь, 1977
2. Festa del lavoro : воскресенье, 1 май, 1977
3. Santo Natale : воскресенье, 25 декабрь, 1977