Define a period

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How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 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 12 public holidays that do not fall during a weekend and we obtain 248 working days in 1978.

Here is the list of these 12 public holidays:

1. Lunes de Carnaval : Monday, 6 February, 1978
2. Martes de Carnaval : Tuesday, 7 February, 1978
3. Jueves Santo : Thursday, 23 March, 1978
4. Día Nacional de la Memoria por la Verdad y la Justicia : Friday, 24 March, 1978
5. Día Internacional de los Trabajadores : Monday, 1 May, 1978
6. Día de la Revolución de Mayo : Thursday, 25 May, 1978
7. Conmemoración de la muerte del General Manuel Belgrano : Tuesday, 20 June, 1978
8. Día del Paso a la Inmortalidad del General José de San Martín : Monday, 14 August, 1978
9. Día del Respeto a la Diversidad Cultural : Monday, 16 October, 1978
10. Día de la Soberanía Nacional : Monday, 20 November, 1978
11. Día de la Inmaculada Concepción : Friday, 8 December, 1978
12. Navidad : Monday, 25 December, 1978

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

1. Año Nuevo : Sunday, 1 January, 1978
2. Día del Veterano y de los Caídos en la Guerra de Malvinas : Sunday, 2 April, 1978
3. Día de la Independencia : Sunday, 9 July, 1978