Define a period

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How many working days in year 1961?

Here is the detail of the calculation:

Because 1961 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 1961.

Here is the list of these 11 public holidays:

1. Sexta-Feira Santa : Friday, 31 March, 1961
2. Dia da Liberdade : Tuesday, 25 April, 1961
3. Dia do Trabalhador : Monday, 1 May, 1961
4. Corpo de Deus : Thursday, 1 June, 1961
5. Assunção de Nossa Senhora : Tuesday, 15 August, 1961
6. Implantação da República : Thursday, 5 October, 1961
7. Todos os Santos : Wednesday, 1 November, 1961
8. Restauração da Independência : Friday, 1 December, 1961
9. Dia da Imaculada Conceição : Friday, 8 December, 1961
10. Natal : Monday, 25 December, 1961
11. Primeira Oitava : Tuesday, 26 December, 1961

And here are the 4 public holidays falling on a weekend:

1. Solenidade da Santa Mãe de Deus : Sunday, 1 January, 1961
2. Páscoa : Sunday, 2 April, 1961
3. Dia de Portugal : Saturday, 10 June, 1961
4. Dia da Madeira : Saturday, 1 July, 1961