Определить период

...

How many working days in year 1905?

Here is the detail of the calculation:

Because 1905 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 11 public holidays that do not fall during a weekend and we obtain 249 working days in 1905.

Here is the list of these 11 public holidays:

1. Sexta-Feira Santa : пятница, 21 апрель, 1905
2. Dia da Liberdade : вторник, 25 апрель, 1905
3. Dia do Trabalhador : понедельник, 1 май, 1905
4. Corpo de Deus : четверг, 22 июнь, 1905
5. Dia de São Pedro : четверг, 29 июнь, 1905
6. Assunção de Nossa Senhora : вторник, 15 август, 1905
7. Implantação da República : четверг, 5 октябрь, 1905
8. Todos os Santos : среда, 1 ноябрь, 1905
9. Restauração da Independência : пятница, 1 декабрь, 1905
10. Dia da Imaculada Conceição : пятница, 8 декабрь, 1905
11. Natal : понедельник, 25 декабрь, 1905

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

1. Solenidade da Santa Mãe de Deus : воскресенье, 1 январь, 1905
2. Páscoa : воскресенье, 23 апрель, 1905
3. Dia de Portugal : суббота, 10 июнь, 1905