Define a period

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How many working days in year 1973?

Here is the detail of the calculation:

Because 1973 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 245 public holidays that do not fall during a weekend and we obtain 245 working days in 1973.

Here is the list of these 245 public holidays:

1. Año Nuevo : Monday, 1 January, 1973
2. Día de los Reyes Magos : Monday, 8 January, 1973
3. Día de San José : Monday, 19 March, 1973
4. Jueves Santo : Thursday, 19 April, 1973
5. Viernes Santo : Friday, 20 April, 1973
6. Primero de Mayo : Tuesday, 1 May, 1973
7. La Ascensión del Señor : Monday, 4 June, 1973
8. Corpus Christi : Monday, 25 June, 1973
9. El Sagrado Corazón de Jesús : Monday, 2 July, 1973
10. Grito de Independencia : Friday, 20 July, 1973
11. Batalla de Boyaca : Tuesday, 7 August, 1973
12. La Asunción de la Virgen : Monday, 20 August, 1973
13. Día de la Raza : Monday, 15 October, 1973
14. Día de Todos los Santos : Monday, 5 November, 1973
15. Independencia de Cartagena : Monday, 12 November, 1973
16. Navidad : Tuesday, 25 December, 1973

And here are the 2 public holidays falling on a weekend:

1. Domingo de Pascua : Sunday, 22 April, 1973
2. Día de la Inmaculada Concepción : Saturday, 8 December, 1973