Определить период

...

How many working days in year 1922?

Here is the detail of the calculation:

Because 1922 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 1922.

Here is the list of these 10 public holidays:

1. Sexta-Feira Santa : пятница, 14 апрель, 1922
2. Dia da Liberdade : вторник, 25 апрель, 1922
3. Dia do Trabalhador : понедельник, 1 май, 1922
4. Corpo de Deus : четверг, 15 июнь, 1922
5. Assunção de Nossa Senhora : вторник, 15 август, 1922
6. Implantação da República : четверг, 5 октябрь, 1922
7. Todos os Santos : среда, 1 ноябрь, 1922
8. Restauração da Independência : пятница, 1 декабрь, 1922
9. Dia da Imaculada Conceição : пятница, 8 декабрь, 1922
10. Natal : понедельник, 25 декабрь, 1922

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

1. Solenidade da Santa Mãe de Deus : воскресенье, 1 январь, 1922
2. Páscoa : воскресенье, 16 апрель, 1922
3. Dia de Portugal : суббота, 10 июнь, 1922