Define a period

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How many working days in year 1911?

Here is the detail of the calculation:

Because 1911 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 13 public holidays that do not fall during a weekend and we obtain 247 working days in 1911.

Here is the list of these 13 public holidays:

1. Lunes de Carnaval : Monday, 27 February, 1911
2. Martes de Carnaval : Tuesday, 28 February, 1911
3. Día Nacional de la Memoria por la Verdad y la Justicia : Friday, 24 March, 1911
4. Jueves Santo : Thursday, 13 April, 1911
5. Viernes Santo : Friday, 14 April, 1911
6. Día Internacional de los Trabajadores : Monday, 1 May, 1911
7. Día de la Revolución de Mayo : Thursday, 25 May, 1911
8. Conmemoración de la muerte del General Manuel Belgrano : Tuesday, 20 June, 1911
9. Día del Paso a la Inmortalidad del General José de San Martín : Monday, 14 August, 1911
10. Día del Respeto a la Diversidad Cultural : Monday, 16 October, 1911
11. Día de la Soberanía Nacional : Monday, 20 November, 1911
12. Día de la Inmaculada Concepción : Friday, 8 December, 1911
13. Navidad : Monday, 25 December, 1911

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

1. Año Nuevo : Sunday, 1 January, 1911
2. Día del Veterano y de los Caídos en la Guerra de Malvinas : Sunday, 2 April, 1911
3. Día de la Independencia : Sunday, 9 July, 1911