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How many working days in year 1983?

Here is the detail of the calculation:

Because 1983 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 4 public holidays that do not fall during a weekend and we obtain 256 working days in 1983.

Here is the list of these 4 public holidays:

1. Good Friday : пятница, 1 апрель, 1983
2. Labour Day : понедельник, 2 май, 1983
3. National Day : вторник, 9 август, 1983
4. Christmas Day : понедельник, 26 декабрь, 1983

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

1. New Year's Day : суббота, 1 январь, 1983
2. Labour Day : воскресенье, 1 май, 1983
3. Christmas Day : воскресенье, 25 декабрь, 1983