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How many working days in year 1988?

Here is the detail of the calculation:

Because 1988 is a leap year, it has 366 days.

Let's remove 53 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 5 public holidays that do not fall during a weekend and we obtain 256 working days in 1988.

Here is the list of these 5 public holidays:

1. New Year's Day : пятница, 1 январь, 1988
2. Good Friday : пятница, 1 апрель, 1988
3. Labour Day : понедельник, 2 май, 1988
4. National Day : вторник, 9 август, 1988
5. Christmas Day : понедельник, 26 декабрь, 1988

And here are the 2 public holidays falling on a weekend:

1. Labour Day : воскресенье, 1 май, 1988
2. Christmas Day : воскресенье, 25 декабрь, 1988