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How many working days in year 1977?

Here is the detail of the calculation:

Because 1977 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 9 public holidays that do not fall during a weekend and we obtain 251 working days in 1977.

Here is the list of these 9 public holidays:

1. New Year's Day (substitute day) : понедельник, 3 январь, 1977
2. 2nd January (substitute day) : вторник, 4 январь, 1977
3. Good Friday : пятница, 8 апрель, 1977
4. Early May Bank Holiday : понедельник, 2 май, 1977
5. Spring Bank Holiday : понедельник, 30 май, 1977
6. Summer Bank Holiday : понедельник, 1 август, 1977
7. St Andrew's Day : среда, 30 ноябрь, 1977
8. Christmas Day (substitute day) : понедельник, 26 декабрь, 1977
9. Boxing Day (substitute day) : вторник, 27 декабрь, 1977