Define a period

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How many working days in year 1965?

Here is the detail of the calculation:

Because 1965 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1965.

Here is the list of these 8 public holidays:

1. Solenidade da Santa Mãe de Deus : Friday, 1 January, 1965
2. Sexta-Feira Santa : Friday, 16 April, 1965
3. Dia de Portugal : Thursday, 10 June, 1965
4. Corpo de Deus : Thursday, 17 June, 1965
5. Implantação da República : Tuesday, 5 October, 1965
6. Todos os Santos : Monday, 1 November, 1965
7. Restauração da Independência : Wednesday, 1 December, 1965
8. Dia da Imaculada Conceição : Wednesday, 8 December, 1965

And here are the 5 public holidays falling on a weekend:

1. Páscoa : Sunday, 18 April, 1965
2. Dia da Liberdade : Sunday, 25 April, 1965
3. Dia do Trabalhador : Saturday, 1 May, 1965
4. Assunção de Nossa Senhora : Sunday, 15 August, 1965
5. Natal : Saturday, 25 December, 1965