Define a period

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How many working days in year 1993?

Here is the detail of the calculation:

Because 1993 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 1993.

Here is the list of these 8 public holidays:

1. Año Nuevo : Friday, 1 January, 1993
2. Viernes Santo : Friday, 9 April, 1993
3. Día de las Glorias Navales : Friday, 21 May, 1993
4. San Pedro y San Pablo : Monday, 28 June, 1993
5. Virgen del Carmen : Friday, 16 July, 1993
6. Día del Descubrimiento de Dos Mundos : Monday, 11 October, 1993
7. Día de Todos los Santos : Monday, 1 November, 1993
8. Día de la Inmaculada Concepción : Wednesday, 8 December, 1993

And here are the 7 public holidays falling on a weekend:

1. Sábado Santo : Saturday, 10 April, 1993
2. Día Internacional de los Trabajadores : Saturday, 1 May, 1993
3. Asunción de la Virgen : Sunday, 15 August, 1993
4. Fiestas Patrias : Saturday, 18 September, 1993
5. Día de las Glorias del Ejércitos : Sunday, 19 September, 1993
6. Día Nacional de las Iglesias Evangélicas y Protestantes : Sunday, 31 October, 1993
7. Navidad : Saturday, 25 December, 1993