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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. Human Rights Day : понедельник, 21 март, 1977
2. Good Friday : пятница, 8 апрель, 1977
3. Family Day : понедельник, 11 апрель, 1977
4. Freedom Day : среда, 27 апрель, 1977
5. Workers' Day observance : понедельник, 2 май, 1977
6. Youth Day : четверг, 16 июнь, 1977
7. National Women's Day : вторник, 9 август, 1977
8. Day of Reconciliation : пятница, 16 декабрь, 1977
9. Day of Goodwill : понедельник, 26 декабрь, 1977

And here are the 4 public holidays falling on a weekend:

1. New Year's Day : суббота, 1 январь, 1977
2. Workers' Day : воскресенье, 1 май, 1977
3. Heritage Day : суббота, 24 сентябрь, 1977
4. Christmas Day : воскресенье, 25 декабрь, 1977