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How many working days in year 1965?

Here is the detail of the calculation:

Because 1965 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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1965.

Here is the list of these 6 public holidays:

1. New Year's Day : пятница, 1 январь, 1965
2. Good Friday : пятница, 16 апрель, 1965
3. Easter Monday : понедельник, 19 апрель, 1965
4. Establishment Day : четверг, 1 июль, 1965
5. National Day : пятница, 1 октябрь, 1965
6. Boxing Day : понедельник, 27 декабрь, 1965

And here are the 4 public holidays falling on a weekend:

1. Holy Saturday : суббота, 17 апрель, 1965
2. Labour Day : суббота, 1 май, 1965
3. Christmas Day : суббота, 25 декабрь, 1965
4. Boxing Day : воскресенье, 26 декабрь, 1965