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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 7 public holidays that do not fall during a weekend and we obtain 255 working days in 1964.

Here is the list of these 7 public holidays:

1. New Year's Day : среда, 1 январь, 1964
2. Good Friday : пятница, 27 март, 1964
3. Easter Monday : понедельник, 30 март, 1964
4. Queen's Day : четверг, 30 апрель, 1964
5. Ascension Day : четверг, 7 май, 1964
6. Pentecost Monday : понедельник, 18 май, 1964
7. Christmas Day : пятница, 25 декабрь, 1964

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

1. Easter Sunday : воскресенье, 29 март, 1964
2. Pentecost Sunday : воскресенье, 17 май, 1964
3. Boxing Day : суббота, 26 декабрь, 1964