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How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 250 working days in 1978.

Here is the list of these 10 public holidays:

1. Sexta-Feira Santa : пятница, 24 март, 1978
2. Dia da Liberdade : вторник, 25 апрель, 1978
3. Dia do Trabalhador : понедельник, 1 май, 1978
4. Corpo de Deus : четверг, 25 май, 1978
5. Assunção de Nossa Senhora : вторник, 15 август, 1978
6. Implantação da República : четверг, 5 октябрь, 1978
7. Todos os Santos : среда, 1 ноябрь, 1978
8. Restauração da Independência : пятница, 1 декабрь, 1978
9. Dia da Imaculada Conceição : пятница, 8 декабрь, 1978
10. Natal : понедельник, 25 декабрь, 1978

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

1. Solenidade da Santa Mãe de Deus : воскресенье, 1 январь, 1978
2. Páscoa : воскресенье, 26 март, 1978
3. Dia de Portugal : суббота, 10 июнь, 1978