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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. St. Patrick's Day : четверг, 17 март, 1977
3. Easter Monday : понедельник, 11 апрель, 1977
4. Early May Bank Holiday : понедельник, 2 май, 1977
5. June Bank Holiday : понедельник, 6 июнь, 1977
6. Summer Bank Holiday : понедельник, 1 август, 1977
7. October Bank Holiday : понедельник, 31 октябрь, 1977
8. Christmas Day (substitute day) : понедельник, 26 декабрь, 1977
9. St. Stephen's Day (substitute day) : вторник, 27 декабрь, 1977