Define a period

...

How many working days in year 2017?

Here is the detail of the calculation:

Because 2017 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 2017.

Here is the list of these 10 public holidays:

1. Sexta-Feira Santa : Friday, 14 April, 2017
2. Dia da Liberdade : Tuesday, 25 April, 2017
3. Dia do Trabalhador : Monday, 1 May, 2017
4. Corpo de Deus : Thursday, 15 June, 2017
5. Assunção de Nossa Senhora : Tuesday, 15 August, 2017
6. Implantação da República : Thursday, 5 October, 2017
7. Todos os Santos : Wednesday, 1 November, 2017
8. Restauração da Independência : Friday, 1 December, 2017
9. Dia da Imaculada Conceição : Friday, 8 December, 2017
10. Natal : Monday, 25 December, 2017

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

1. Solenidade da Santa Mãe de Deus : Sunday, 1 January, 2017
2. Páscoa : Sunday, 16 April, 2017
3. Dia de Portugal : Saturday, 10 June, 2017