Define a period

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How many working days in year 1976?

Here is the detail of the calculation:

Because 1976 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 15 public holidays that do not fall during a weekend and we obtain 247 working days in 1976.

Here is the list of these 15 public holidays:

1. Año Nuevo : Thursday, 1 January, 1976
2. Día de los Reyes Magos : Monday, 12 January, 1976
3. Día de San José : Monday, 22 March, 1976
4. Jueves Santo : Thursday, 15 April, 1976
5. Viernes Santo : Friday, 16 April, 1976
6. La Ascensión del Señor : Monday, 31 May, 1976
7. Corpus Christi : Monday, 21 June, 1976
8. El Sagrado Corazón de Jesús : Monday, 28 June, 1976
9. San Pedro y San Pablo : Monday, 5 July, 1976
10. Grito de Independencia : Tuesday, 20 July, 1976
11. La Asunción de la Virgen : Monday, 16 August, 1976
12. Día de la Raza : Monday, 18 October, 1976
13. Día de Todos los Santos : Monday, 1 November, 1976
14. Independencia de Cartagena : Monday, 15 November, 1976
15. Día de la Inmaculada Concepción : Wednesday, 8 December, 1976

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

1. Domingo de Pascua : Sunday, 18 April, 1976
2. Primero de Mayo : Saturday, 1 May, 1976
3. Batalla de Boyaca : Saturday, 7 August, 1976
4. Navidad : Saturday, 25 December, 1976