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How many working days in year 1975?

Here is the detail of the calculation:

Because 1975 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1975.

Here is the list of these 10 public holidays:

1. Solenidade da Santa Mãe de Deus : среда, 1 январь, 1975
2. Sexta-Feira Santa : пятница, 28 март, 1975
3. Dia da Liberdade : пятница, 25 апрель, 1975
4. Dia do Trabalhador : четверг, 1 май, 1975
5. Corpo de Deus : четверг, 29 май, 1975
6. Dia de Portugal : вторник, 10 июнь, 1975
7. Assunção de Nossa Senhora : пятница, 15 август, 1975
8. Restauração da Independência : понедельник, 1 декабрь, 1975
9. Dia da Imaculada Conceição : понедельник, 8 декабрь, 1975
10. Natal : четверг, 25 декабрь, 1975

And here are the 3 public holidays falling on a weekend:

1. Páscoa : воскресенье, 30 март, 1975
2. Implantação da República : воскресенье, 5 октябрь, 1975
3. Todos os Santos : суббота, 1 ноябрь, 1975