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How many working days in year 1987?

Here is the detail of the calculation:

Because 1987 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1987.

Here is the list of these 9 public holidays:

1. New Year's Day : четверг, 1 январь, 1987
2. St. Patrick's Day : вторник, 17 март, 1987
3. Easter Monday : понедельник, 20 апрель, 1987
4. Early May Bank Holiday : понедельник, 4 май, 1987
5. June Bank Holiday : понедельник, 1 июнь, 1987
6. Summer Bank Holiday : понедельник, 3 август, 1987
7. October Bank Holiday : понедельник, 26 октябрь, 1987
8. Christmas Day : пятница, 25 декабрь, 1987
9. St. Stephen's Day (substitute day) : понедельник, 28 декабрь, 1987