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How many working days in year 1964?

Here is the detail of the calculation:

Because 1964 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 251 working days in 1964.

Here is the list of these 11 public holidays:

1. New Year's Day : среда, 1 январь, 1964
2. National day : вторник, 3 март, 1964
3. Orthodox Easter Friday : пятница, 1 май, 1964
4. Orthodox Easter Monday : понедельник, 4 май, 1964
5. St. George's Day : среда, 6 май, 1964
6. Culture and Literacy Day (observance) : понедельник, 25 май, 1964
7. Unification Day (observance) : понедельник, 7 сентябрь, 1964
8. Independence Day : вторник, 22 сентябрь, 1964
9. Christmas Eve : четверг, 24 декабрь, 1964
10. Christmas Day : пятница, 25 декабрь, 1964
11. Christmas Day (observance) : понедельник, 28 декабрь, 1964

And here are the 5 public holidays falling on a weekend:

1. Orthodox Easter Saturday : суббота, 2 май, 1964
2. Orthodox Easter Sunday : воскресенье, 3 май, 1964
3. Culture and Literacy Day : воскресенье, 24 май, 1964
4. Unification Day : воскресенье, 6 сентябрь, 1964
5. Boxing day : суббота, 26 декабрь, 1964